Garden & Lawn

Top 9 Best Greenhouses and which models we recommend and more importantly, why?

Last updated on February 12th, 2022

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We all know how hard it can be in winter with low temperatures or bad weather and that some plants, even some classed as hardy, need some winter protection, especially those grown in pots. However, the unpredictable British weather need not be an issue anymore. With a good greenhouse, you can create a great environment for your plants to thrive all year round and it’s a great way to start seedlings off early.

But with so many models available out there, it can be hard to choose the best greenhouse, especially because greenhouses come in a wide range of styles. That’s why we did extensive research to find the top-rated products on the market and we compiled them herein in the form of product reviews. There’s also a comprehensive buyer’s guide for your reference anytime you want to buy a greenhouse.

From our model comparisons, the Palram Harmony Greenhouse (6×10) is clearly the standout product because it comes with a durable aluminium frame, unbreakable polycarbonate panels and a decent range of accessories such as gutters. This greenhouse is expensive but worth every penny for its size.

Now let’s dive into the meat.

BEST PICK

Palram 6 x 10ft Harmony Greenhouse
One of the best-built greenhouses on the market, it’s made of a strong, rust-resistant aluminium frame along with virtually unbreakable polycarbonate panels. It guarantees top durability and even has an industry-leading 5-year warranty to affirm its quality. Measuring 6 x 10ft, it no doubt offers acres of space to grow a wide variety of plants and it's high enough for even the tallest people to get in and tend to plants. Additional value comes in the form of a vent window kit for ventilation and gutters to channel and collect rainwater. A sliding panel system allows for easy assembly and no maintenance is required for this product.

Our top 9 garden greenhouses for the home gardener:

  1. Palram Mythos 6 x 8ft Silver Greenhouse – RUNNER UP
  2. FeelGoodUK Polytunnel, 3 x 2 x 2m – ANOTHER GREAT PICK
  3. VonHaus Compact Walk-In Greenhouse with 6 Shelves – BEST BUDGET PICK
  4. Plantpak Grow House
  5. Garden Grow 6 x 4ft Polycarbonate Greenhouse
  6. Deuba Lean-To Greenhouse
  7. Palram Harmony 6 x 10ft Green Greenhouse – BEST PICK
  8. Waltons 4 x 6ft Evesham Wooden Greenhouse – BEST WOODEN PICK
  9. Finether Garden Greenhouse: 3-Tier Walk-In Greenhouse

RUNNER UP

Palram 6 x 8ft Mythos Greenhouse
Measuring 6 x 8ft, this is the ideal greenhouse for most British gardens. It is well built with twin-wall polycarbonate glazing that allows more than 70% light transmission. It stands tall at 208cm, providing plenty of headroom for one to move around freely while tending to plants. The frame is aluminium, which is sturdy and lightweight. An adjustable roof vent allows air circulation and there’s a lockable door handle with magnetic catch for secure locking. This greenhouse also comes with a galvanised steel base for enhanced support. Palram offers a 5-year warranty so you can buy with confidence.

Greenhouse Buyer’s Guide

Whether you want to try your hand at horticulture or you’re a pro gardener with a green thumb, a greenhouse is a fundamental investment to enjoying your gardening throughout the year. Below we have underlined several factors to consider before buying a greenhouse so you can get the most out of your time and money. 

Wood or Metal Greenhouse?

Wood was the conventional choice, with Red Cedar being the popular choice because it was hard enough to last for years. The real benefit of wood is in its insulation property whereby it keeps the greenhouse cooler in summer and warmer in winter. There’s additionally the distinctive smell of timber, with many people liking its look and characteristics compared to other building materials. 

However, the initial cost, plus maintenance expenses relating to wood treatment, make it an expensive option in the long run. There’s also the threat of rot and decay. But, manufacturers these days use pressure treated timber, and some manufacturers offer a lifetime guarantee against decay. Others have adopted the recently introduced ThermoWood, which has been practically rid of moisture, thus no treatment is required and its crack resistant. That being said, we always recommend treating timber to ensure it lasts and stays looking like new.

The other alternative, which we personally prefer is metal, and precisely, aluminium. This material is lightweight and makes for easy transportation whenever there’s a need. With aluminium, there’s no worry about rust or decay and the structure can be left out and will withstand the elements for many, many, years. Perhaps the biggest advantage of aluminium greenhouses is that they are generally cheaper than wooden greenhouses. On the downside, aluminium dulls off after some time but manufacturers have found that powder coating the material is the solution to this problem. 

After choosing the material of your greenhouse, the next factor to consider is style. 

BEST BUDGET PICK

VonHaus Compact Walk In Greenhouse with 6 Shelves
Perfect for small gardens, this greenhouse provides more than enough space for growing plants without breaking the bank. It comprises 6 removable shelves, allowing you to grow seedlings until they are tall enough to be planted elsewhere. Each shelf can hold up to 8kg for a combined 48kg weight capacity, which is impressive for the price. Of course, the walk-in design allows one to move in and out easily, while its weather-resistant PVC cover plays an important role in letting in light and protecting plants at the same time. Suitable for all year round use, this model is a steal.

Read my latest review of the best aluminium greenhouses here.

Greenhouse style

Freestanding design

This is very practical, offers plenty of growing space, lets in light from all sides and offers enough room for staging. Modern designs have introduced curved glazing and barn-style roofing to create additional height for taller plants. There are also freestanding circular designs, however, they are a bit limited to space on the inside. These are better suited to large gardens where they become focal points. 

Lean-to design

This is ideal for limited spaces, however, they don’t work well with north-facing walls and they can overheat if facing south. Light levels are minimal compared with a freestanding design so manufacturers paint the back wall white in order to reflect light to the plants within. Apart from retaining heat, the back wall can be used to support climbing plants such as grapes vines. If there’s an internal door leading to the lean-to, the better convenience to you when accessing the greenhouse. Note that you can only use toughened glass for the internal door. They are great for leaning against a house wall.

Size

How much space do you have for growing? Actually, what do you want to grow? Tomatoes, for instance, need plenty of headroom plus a great amount of light so you will be doing yourself a favour by getting a taller greenhouse. Keep in mind that you also need room to work inside your greenhouse. 

Note that size is relative to price. If you’re just starting out in gardening, it makes sense to purchase a smaller, cheaper greenhouse kit than going for an expensive, larger model. Sometimes you might also need to buy the ideal greenhouse that your space and budget can allow.

Unless you own a home, space is fairly limited in most British gardens, especially in cities. For that reason, the 8′ x 6′ greenhouses and the smaller versions account for most of the greenhouses sold in the UK. These are a good option to start with before advancing to the 8′ x 10′ as your skills develop and so forth. Commercial growing will need over 12 feet wide. 

Read our review here of the best mini greenhouses available.

BEST WOODEN PICK

Waltons 4 x 6ft Evesham Wooden Greenhouse
This wooden version is made of FSC Certified Timber with a 10-year anti-rot guarantee. It makes a great choice for avid gardeners but annual treatment of the structure is a must. This one is designed and made in the UK with inherent factors considered in its manufacturing. The structure makes use of UV treated styrene glazing for durability. Quite an expensive model but you get what you pay for and Waltons are very well known for quality.

Lighting

Think of this in terms of the strength of solar light that your plants will get from the sun. It comes down to the glazing options and here you can choose either transparent, semi-transparent or opaque panelling. Plants need varying amounts of diffused light depending on their growth stage. 

The glass itself can vary in strength and other manufacturing details, so there is standard horticultural glass, toughened safety glass and polycarbonate glazing. 

Standard horticultural glass is the cheapest option whilst it’s clear to let in the maximum amount of light. However, this glass breaks easily under pressure, for instance, when fitting or cleaning and splinters into shards. It may not be the best choice if you have children around. 

Toughened safety glass is very strong and clear for allowing the maximum amount of light. In case of impact, this glass disintegrates rather than breaking into tiny shards, therefore, safer than standard glass. 

Polycarbonate is the most popular glazing version and the safest option. It’s harder to break, even being described as virtually unbreakable and offers excellent insulation. Polycarbonate lets in around 85% of light whilst it has great diffusion properties. However, not letting in as much light is a downside in itself. Low quality polycarbonate is also vulnerable to wind damage and quality is a must, usually, it is the cheaper greenhouses that use poor quality polycarbonate.

Heating

Botanico 2kw Greenhouse Heater Review
Botanico 2kw Greenhouse Heater

Do you need to invest in heating? Yes, if you want to keep plants over the winter months. The three types of heating available for domestic greenhouse include:

Electricity

Clean, easy to use and reliable. High temperatures can be achieved and are controllable via a thermostat. The use of fan heaters ensure uniform heat circulation, whilst the fans can work to cool the inside during the summer months.

There are many electric heaters available and we have even reviewed some of the best models. You can check this article out below.

Read our buyer’s guide where we compared the best greenhouse heaters

Gas

Propane and butane are the most commonly used in commercial greenhouse heating. Whilst high temperatures can be achieved, gas heating might give off harmful fumes. Condensation is hard to avoid and there must also be a spare cylinder on the ground. There are some smaller gas greenhouse heaters for the home user.

Paraffin 

A cheap option but high running costs due to frequent refuelling and maintenance. Fumes are obvious and temperature control is almost impossible and mainly just suitable for keeping the frost out and protecting more tender garden plants in pots. Humidity and condensation are also major concerns with this heating option. 

Greenhouse location

The ideal location for a greenhouse is an area that gets maximum sunlight. The greenhouse ought to be far from structures and trees that may cast unwanted shadows over it. Make sure to level the site before purchasing your greenhouse. The greenhouse should be near sources of water and electricity for obvious reasons. If you buy a lean-to design, be sure to locate it on a south-facing wall for the best possible growing conditions.

Check out our reviews of the best automatic greenhouse vent openers which we would seriously consider.

ANOTHER GREAT PICK

FeelGoodUK 3 x 2 x 2m Polytunnel
The dimensions are clear; a small polytunnel for domestic growing. You can occasionally grow vegetables and tender plants in this polytunnel with UV inhibiting cover. The product is really cheap yet it has full metal framing and offers an exclusive rain gutter. A great affordable choice for those just starting out.

Top 9 Greenhouse Reviews

1. Palram Harmony 6 x 10ft Greenhouse

BEST PICK

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Palram Canopia Harmony 6x10 Green Greenhouse - Clear Polycarbonate, Aluminum Frame, Base Included

The Palram Harmony 6 x 10ft Greenhouse is the ideal greenhouse for growing your own vegetables, flowers and other plants. The structure is built from a rust-resistant, sturdy aluminium frame for maximum durability. Clear, polycarbonate side and roof panels provide over 90% light transmission for uniform plant growth plus 100% UV protection to ensure that plants don’t burn in extreme conditions. 

With no sharp edges to be cautious of, the polycarbonate panels make for safe assembly using the Side n’ lock system. Furthermore, the package includes step by step instructions to help in setting up the structure. A hinged door with a magnetic catch offers extra safety assurance whilst a galvanised steel base provides essential stability. Gutters are also included to help users collect rainwater that can be used for irrigation. 

Palram Harmony 6x10 Green Greenhouse - Clear Polycarbonate, Aluminum Frame, Base Included

The dimensions of this greenhouse is around 306 in length x 185 wide and 208cm tall. The height provides plenty of headroom and a better workspace. A vent kit is also included for moderating temperature and humidity inside the greenhouse. By the way, Palram has a wide range of accessories that you can purchase for reinforcing your greenhouse environment and making life easier, they also sell an automatic vent opener. Worth mentioning is that you can count on the 5-year warranty of this greenhouse for extra peace of mind.

Palram Harmony 6x10 Green Greenhouse - Clear Polycarbonate, Aluminum Frame, Base Included

Pros

  • Has a rust-resistant, aluminium frame for maximum durability. 
  • Comes with a galvanised steel perimeter base to provide great stability. 
  • Allows ventilation whenever required thanks to the supplied vent window kit.
  • Integrates a gutter to channel and collect rainwater for greenhouse irrigation.
  • Easy to build the greenhouse thanks to the sliding panel system.
  • Polycarbonate glazing transmits over 90% of light for effective plant growth.
  • Warranted for 5 years so you can purchase with confidence. 

Cons

  • Quite pricey. 
  • Panels are a bit on the flimsy side but adequate. 
Palram Harmony 6x10 Green Greenhouse - Clear Polycarbonate, Aluminum Frame, Base Included

Our recommendation

If you have a relatively large space in your back garden or want to grow a considerable number of plants, this greenhouse would do you good. The sliding panel system makes for easy installation and the strong aluminium frame is sure to last a long time. The ventilation kit is pretty useful, however, it may be worth looking at the automatic vent system you can also invest in.

There are a few niggles with this greenhouse. Price can obviously seem to be a deal-breaker for some, but what might be a little more worrying are the panels because some customers have commented on them being a little flimsy. That being said, it’s warranted for five years for full peace of mind.  Green or Silver? The choice is yours though. 

Overall a great greenhouse with plenty of space for the price.

Read next: The best polytunnels, a good and cheaper alternative to a greenhouse

Read next: The best lean-to greenhouses for placing against a wall


2. Palram Mythos 6 x 8ft Silver Greenhouse 

RUNNER UP

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Palram Canopia Mythos 6x8 ft Silver Greenhouse -TwinWall Polycarbonate, Aluminum Frame, Base Included

The Palram Mythos 6 x 8ft Silver Greenhouse brings enthusiastic gardeners the best of both worlds; a strong 6ft wide frame designed precisely for compact spaces and two upgraded polycarbonates. Double-wall polycarbonate is the best choice for quality hobby greenhouses because of its longevity, heat-retaining ability and light diffusing properties.

The crystal clear polycarbonate side panels provide up to 90% light transmission whilst the roof panels block 100% of solar UV radiation. In addition, the polycarbonate creates a system of diffused light to eliminate the risk of plant burn and maximises plant growth. 

Palram Mythos 6x8 ft Silver Greenhouse -TwinWall Polycarbonate, Aluminum Frame, Base Included

Featuring a heavy-duty galvanised steel base, along with a rust-resistant aluminium frame, the Palram Mythos is designed to last for many years. Another impressive feature of this greenhouse is an integrated gutter to channel rainwater for sustainable irrigation. The door features a magnetic catch for safe locking of the greenhouse, while there’s a roof vent to help moderate ventilation and the temperature to enhance growing conditions. 

Palram Mythos 6x8 ft Silver Greenhouse -TwinWall Polycarbonate, Aluminum Frame, Base Included

This greenhouse measures 6.8ft in height, which provides more than enough headroom plus the eaves for maximised workspace. There are also many accessories available for purchase in order to improve your greenhouse environment. One of them is an anchoring kit that can help the greenhouse withstand winds up to 56 mph. Finally, the greenhouse comes with an industry-leading 5-year warranty to secure your purchase and provide you with full peace of mind. 

Palram Mythos 6x8 ft Silver Greenhouse -TwinWall Polycarbonate, Aluminum Frame, Base Included

Pros

  • Easy assembly and maintenance-free because it’s made of an aluminium frame and polycarbonate panels. 
  • Clear polycarbonate side panels provide great light diffusion and UV protection. 
  • Includes an adjustable roof vent for air flow.
  • Has a lockable door handle with magnetic catch for safe locking of greenhouse.
  • Supplied with a galvanised steel base for enhanced greenhouse support.
  • Provides high headroom and enough workspace so users can walk inside without restriction.
  • Comes with an unmatched 5-year warranty for full peace of mind. 

Cons

  • Some people have commented on the polycarbonate panels being a little flimsy. 
Palram Mythos 6x8 ft Silver Greenhouse -TwinWall Polycarbonate, Aluminum Frame, Base Included

Our recommendation

This is a relatively large domestic greenhouse for gardening hobbyists and probably one of the best models to invest in for a few reasons. First off, building the structure takes about 6 to 8 hours and the assembly instructions are provided for you to follow during the installation and most will find them easy to read.

The aluminium frame is durable and the polycarbonate panels protect against UV radiation incredibly well. The quality seems okay despite some comments on them being a little flimsy, however, they’re better than most of the cheaper models.

As with nearly all models, we highly advise anchoring this greenhouse down because it’s fairly lightweight. On the plus side, you’ll love the headroom and workspace available inside this greenhouse and appreciate the function of the supplied gutters where you can direct the rainwater into a water butt.

All in all, the Palram Mythos 6 x 8ft Silver Greenhouse is a fabulous kit that is fairly priced and does come with a lengthy 5 year guarantee. After much debate, we decided that this model would probably be a good choice for most people because its available in a few other sizes so you are sure to find the right size for you.


3. VonHaus Compact Walk In Greenhouse with 6 Shelves

BEST BUDGET PICK

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VonHaus Compact Walk In Greenhouse with 6 Shelves

Built to protect plants from the elements, but suitable for a variety of purposes, this VonHaus Compact Walk In Greenhouse with 6 Shelves is large enough to house plenty of plants. And as the title suggests, it’s compact enough to fit in virtually all gardens of any size. Due to its large footprint, however, the structure is not really portable.

This greenhouse has a sturdy frame made of powder-coated steel and includes six removable wire shelves. Each shelf can hold up to 8kg of plants, making a total of 48kg weight capacity. The roof is angled in a way that lets rain runoff and there’s a clear PVC cover to place over it. Better still, the cover has a roll-up zip curtain that allows easy access and enough ventilation. The PVC cover does an amazing job of protecting the plants from the elements and pests.

The product is easy to assemble and disassemble when needed, and it can be used all year round. It measures 143 x 73 x 193cm (L x D x H). As the plants grow taller, the shelves can be removed entirely to provide more room in height. Last but not least, VonHaus offers a 2-year warranty for this greenhouse.

Pros

  • Spacious enough to accommodate potting soil bags, large pots and gardening tools.
  • Walk-in design allows you to tend to your plants without bending.
  • Easy to build and dismantle due to its simple push-together system.
  • Includes a handy PVC cover to protect plants from the elements.
  • Comes with a 2-year warranty.

Cons

  • Given its height, short people might have issues in assembling the greenhouse.

Our recommendation

The VonHaus Compact Walk In Greenhouse with 6 Shelves is a very good pick because it’s low-cost, has strong shelves and is a piece of cake to put together and dismantle. The space it offers is sufficient for growing a great number of plants and its shelves can even be removed to allow more space for growth.

Also, getting in and out of this walk-in greenhouse is a breeze. On the downside, we hate that the PVC cover is delicate and can rip easily. You can get replacement covers easily, but the available ones could have been made from better material. All in all, this product is not only a great alternative to a conventional greenhouse but the best you can get on a budget.


4. Plantpak Grow House

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Plantpak Grow House

The Plantpak 70200425 Grow House is another greenhouse that can be used all year round due to the fact that it has been designed to high standards. It’s made from wood combined with 5mm thick UV-treated polycarbonate glazing, which allows sufficient light to get to the plants. The greenhouse comes flat packed but is easy to put together using a Philipps screwdriver. The assembled structure measures 70.5 x 41 x 132cm (L x W x H).

This greenhouse will protect your plants from damage caused by harsh weather conditions and still serve as safe storage for potted plants. Given its compact design, the grow house is suitable for where you may not have space to place a full-size greenhouse and is a fantastic addition to any garden because of its aesthetic appeal.

It has two doors and these make access in and out of it a breeze as well as tending to your plants. In addition, it comes with three shelves that are all adjustable in height. Integral to this grow house are two opening lids that allow the air to flow and they can be independently operated for flexibility. Moreover, the unique hinged design with locking allows users to open and tilt the roof to virtually any position.

Pros

  • Sturdy enough to withstand a proper storm.
  • Freestanding design, so you can place it anywhere you want.
  • Adjustable shelves that can be removed to better accommodate taller plants.
  • A great option for where you can’t use a full size greenhouse.

Cons

  • Paint is very thin and might need a coat to last longer.
  • Some may consider it expensive.

Our recommendation

First-time buyers love the ease of assembling this Plantpak 70200425 Grow House and it takes around 20 minutes for a skilled gardener. Moreover, this little greenhouse can be placed anywhere in the garden and its three sturdy shelves offer enough room for young plants. The adjustability of the shelves is a welcome touch. All things considered, this greenhouse is a great addition to any garden and can be used for multiple projects.


5. Waltons 4 x 6ft Evesham Wooden Greenhouse

BEST WOODEN PICK

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Waltons 4 x 6ft Evesham Wooden Greenhouse

The Waltons 4 x 6ft Evesham Wooden Greenhouse is suitable for smaller gardens and provides a nice growing area for vegetables, flowers and plants. With an interlocking design featuring 12mm Shiplap tongue and groove cladding, the greenhouse ensures that your plants stay safe and fully protected from harsh weather. 

The glazing features 2.5mm styrene that has been UV treated to protect plants against UV rays. The styrene is additionally eco-friendly and 100% shatterproof. This kind of glazing is a much safer alternative to conventional glass glazing and makes it perfect for busy gardeners. To help regulate airflow, Waltons have created an opening roof vent, whilst the roof height (2.10m) gives plenty of headroom, even for the tallest individuals. A turn button is included to help keep the door secure and in place. 

Being a wooden structure, the greenhouse requires annual treatment with a high-quality timber preservative. This is actually a stern requirement for the validity of the 10-year anti-rot guarantee offered on this product. 

WALTONS EST. 1878 4x6 Wooden Garden Greenhouse, Shiplap Construction, Dip Treated with 10 Year Guarantee, Includes Apex Roof, Single Door, Styrene Windows (4 x 6/4Ft x 6Ft) 3-5 Day Delivery

Pros

  • Glazed using UV-resistant, shatterproof styrene that helps to protect plants against harmful rays.
  • Supplied with turn button to keep doors secure and in position. 
  • The use of 12mm shiplap tongue and groove cladding creates a strong and weatherproof structure.
  • Opening roof vents lets out warm air to create ideal growing environment.
  • Has a 10-year anti-rot guarantee, however, the timber must be treated annually. 

Cons

  • No problems to report.

Our recommendation

The Waltons 4 x 6ft Evesham Wooden Greenhouse is a well-designed piece that would do justice to beginners, intermediate and advanced gardeners alike. It is a strong structure that protects plants from harmful UV rays thanks to styrene glazing.

The included roof vents are useful in creating an ideal environment for growing and an anti-rot guarantee offers several years of service.

As you’d expect, this wooden greenhouse is more expensive than aluminium models but it’s worth the investment and does come with that 10 year anti-rot guarantee. Overall, certainly worth considering for anyone looking for a wooden greenhouse.


6. FeelGoodUK Polytunnel – 3 x 2 x 2m

ANOTHER GREAT PICK

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FeelGoodUK Polytunnel - 3 x 2 x 2m

If you want to be self-sufficient in vegetables and fruits, a polytunnel greenhouse is something you should consider. The FeelGoodUK Polytunnel, 3 x 2 x 2m is one of a kind and will be suitable for small-scale growing. This polytunnel is built from a strong metal frame, semi-circular tunnel with durable UV-resistant polythene covering to maximise its lifetime. 

The model is designed with a hinged 25mm steel tubular door, therefore, eliminating the need for zips whilst providing enhanced security. Another handy feature is a rainwater collection system. There’s a dedicated gutter on one side of the polytunnel that harvests rainwater and channels it to a water butt. On the other side, there’s a roll up window that can be set to allow maximum airflow or rolled up partly to create an extra rain gutter. In fact, setting up rainwater gutters couldn’t be easier than this. 

FeelGoodUK Polytunnel, 3 x 2 x 2 m

Strong welded joints throughout the structure make for a sturdy polytunnel that can withstand the elements, unlike some of the cheaper models that look almost identical. The dome design additionally creates less resistance compared to a tall, rectangular structure, so winds will smoothly blow over the polytunnel.

This polytunnel transmits over 90% of light, which is then diffused to prevent plants from shading each other. Polytunnels naturally enclose plenty of warm air so they do not suffer temperature fluctuations like greenhouses. 

FeelGoodUK Polytunnel, 3 x 2 x 2 m

Pros

  • A great choice for those looking for a more affordable choice than the usual aluminium greenhouses.
  • Sturdy structure due to welded junctions and a nut and bolt construction. 
  • Provides rain water collection gutters on both sides. 
  • Allows ventilation through roll up windows.
  • Has a metal frame hinged door that removes the need for zips altogether.
  • Built in gutter to collect water.
  • Can be built in only a few hours.

Cons

  • Cover will probably not last as long as the polycarbonate panels of a greenhouse so will have a shorter life span. 

Our recommendation

The FeelGoodUK 3 x 2 x 2m Polytunnel makes a very affordable choice for growing plants and vegetables at home and is much cheaper than most greenhouse alternatives. The polytunnel traps essential warmth for plant growth whilst its roll up windows can allow maximum ventilation when needed, especially in Summer. By simply rolling up the windows, you can create rain gutters and fetch rainwater for irrigating your plants later.

We found some complaints concerning the durability of the cover, but then again, you don’t expect a cheap polytunnel to last a lifetime. So if you want something for short-term use, this makes a good budgetary choice for those who are in need of a little more growing space

It’s certainly one of the best green polytunnels, like the ones you see at every garden centre and online stores.


7. Garden Grow 6 x 4ft Polycarbonate Greenhouse

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Garden Grow 6 x 4ft Polycarbonate Greenhouse

The Garden Grow 6 x 4ft Polycarbonate Greenhouse is a great structure for growing a variety of vegetables and offer protection from frost for those tender plants. Constructed with an aluminium frame, the structure requires no treatment or paint whilst remaining strong and rustproof. In fact, the aluminium has been coated in silver or green for a stylish finish.

The structure has a sliding door design that maximises usable space yet still provides straightforward access into the greenhouse. Another benefit of this design is that there’s no slamming shut involved, especially in strong winds.

Polycarbonate Greenhouse Large Walk-in Garden Growhouse, Rust-proof Frame, Sliding Door & Supported Twin Wall Panels with Steel Base 6x4' (Standard Silver)

On hot summer days, airflow within the greenhouse is important. As such, this greenhouse comes with a large roof vent to allow ventilation during hot weather. The use of polycarbonate glazing makes the greenhouse safe to use in gardens with children and pets. Polycarbonate is 100% shatterproof and much stronger than glass. This plastic compound is additionally good for plants because it protects them from harmful UV rays and burning on hot days. 

For excellent heat retention and even light diffusion, the greenhouse features double-wall, eco-friendly 4mm polycarbonate glazing, which is also very lightweight. Rain gutters are another integral component of this model and they help collect rainwater that can be used whenever there’s a need. Also supplied is a heavy-duty base to provide extra strength and stability. The package arrives with all fittings, fixtures and assembly instructions. Be sure to watch the manufacturer’s step by step installation video on their website to help you build the structure. 

Polycarbonate Greenhouse Large Walk-in Garden Growhouse, Rust-proof Frame, Sliding Door & Supported Twin Wall Panels with Steel Base 6x4' (Standard Silver)

Pros

  • Made from strong aluminium that is rustproof and low maintenance. 
  • Polycarbonate glazing provides excellent heat retention and light diffusion.
  • Has a sliding door design that helps maximise usable space whilst allowing straightforward entry.
  • Integral rain gutters collect rainwater that can be used at your convenience.
  • Includes a roof window for ventilation during hot summer days.
  • Comes with a heavy-duty galvanised steel base for stability and extra strength.

Cons

  • Building the greenhouse is quite difficult due to poor instructions but Waltons have a good video by Garden Grow worth watching showing you how to build it.

Our recommendation

The Garden Grow 6 x 4ft Polycarbonate Greenhouse is an impressive structure for a very good price. It arrives with everything needed to put together, however, the assembly process has been reported to be quite hectic. Because of this, we highly recommend watching the video on how to build it on the Waltons website as it makes it much easier.

We like the polycarbonate glazing for UV protection and heat retention. Ventilation is very possible on hot days while the rain gutters become useful during wet rainy days if you attach them to a water butt to collect the water. The sliding door design is great as well. Overall, a stylish greenhouse for small-scale growing and perfect for the typical gardener looking for one of the more affordable options.


8. Deuba Lean-To Greenhouse

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Deuba Lean-To Greenhouse

This Lean-To 6 x 4ft greenhouse is a great option when you don’t have the space of an open garden yet you still love growing plants. The Deuba Lean-to Greenhouse can slot conveniently against a south-facing wall, even in the smallest city garden.

This greenhouse arrives disassembled in two packages and it’s your job to build the structure at home. Previous users have reported it taking over 6 hours to build, and tools such as metal drill bit and masonry drill bit and fixings being crucial for the job. You will find assembly instructions in the box, however, they are in German. Successful users relied on diagrams in the instructions and we advise you to follow suit and take your time, lay out all the pieces first before you begin. If you’re good at DIY you should find it fairly easy, if you are not the DIY type, it may be better to buy an alternative and avoid the stress. 

The Lean-To’s proximity to the house makes for better insulation, plus accessibility to your water and electricity supply. Electricity is a huge bonus in a lean-to greenhouse because it means you can light up the structure and pop in at night if you want to water plants, let alone warm up the space on cold winter days. There’s also enough room for ventilation when needed thanks to the adjustable roof and door opening. The door itself is the sliding type, which ensures that all the interior greenhouse space is utilised.  It is worth noting the door cannot be changed to the other side.

A rain gutter forms part of this greenhouse and that means rainwater can be collected for future use. The structure is made of strong aluminium plus 4mm polycarbonate walls that are shockproof and excellent UV protectors. A nice and cheap greenhouse it is. 

Deuba Lean to Greenhouse Polycarbonate Window Vent 192x127x202cm Aluminium Grow Hot House - 4.9m³

Pros

  • Allows air circulation due to adjustable roof vent and door opening.
  • Includes a gutter to help fetch rainwater. 
  • Can greatly benefit from water and electricity supply due to proximity to a house. 

Cons

  • Assembly instructions are in German and not everyone can figure out the process so best left to those who like the challenge of a DIY project.

Our recommendation

The Deuba Lean-to Greenhouse can be sited right up against your house, providing easy access to the structure anytime. This additionally makes it easy to supply water and electricity into the greenhouse if needed.

The polycarbonate wall panels make for a strong structure whilst protecting plants from harmful UV rays. Users are able to fully utilise the 6 x 4ft space because the door doesn’t take up any of it at all.

The only downside is the instructions are provided in German only, meaning you can only follow diagrams to install the structure. Apart from that, this greenhouse is perfect to use even in extreme conditions. A shame about the instructions when all it would take is some really good diagrams.


9. Finether Garden Greenhouse: 3-Tier Walk-In Greenhouse

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Finether Garden Greenhouse: 3-Tier Walk-In Greenhouse

The Finether Garden Greenhouse: 3-Tier Walk-In Greenhouse provides a way for you to get a large growing area for a relatively small amount of money. Ideal for seed germination, rooting cuttings and plant growing, this walk-in greenhouse allows you to grow a variety of plants, fruits, flowers, herbs and vegetables effectively with little hassle, and keeps them perfectly protected from the elements. Apart from the garden, the greenhouse is perfect for patios, balconies and decks.

The frame is made of powder-coated metal for enhanced resistance against rust or water damage and it can hold up to 10kg of evenly distributed weight. The assembled dimensions of this greenhouse are 69 x 49 x 158cm (W x D x H) and it comes with 4 space-saving storage shelves. In addition, the bottom shelf sits above the floor to allow ventilation underneath.

A tear-proof PVC cover lets light in while keeping the elements such as UV rays, chilly wind, rain and snow out. Better still, you can always open the greenhouse easily with the zippered roll-up door. For easy mobility, this lightweight greenhouse (4.5kg) includes 4 smooth rolling casters, with two of them equipped with brakes to lock the greenhouse into place for stability.

Assembling this grow house takes only a few minutes and no tools are required. You will find the assembly manual in the box for your reference. Lastly, the product comes with a 2-year manufacturer’s warranty.

Pros

  • Suitable for seed germination, rooting cuttings and growing plants.
  • Solid construction featuring a powder-coated metal frame for durability.
  • Tear-proof PVC cover protects plants from the elements.
  • With rolled up zippered door for easy access.
  • Comes with 4 smooth rolling casters to help with mobility.
  • Easy to put together and sturdy when built.
  • Comes with a 2-year warranty.

Cons

  • May not hold its own in very strong winds.

Our recommendation

This Finether Garden Greenhouse: 3-Tier Walk-In Greenhouse is an impressive product that can hold a decent 10kg of plant weight on its four shelves. You will have to seek elsewhere if you need more capacity than it offers. It also means that this greenhouse is mostly suitable for small plants. The high-quality powder-coated metal frame with a reinforced PVC cover will protect your plants against the elements, but this structure may not be the one you want to face strong winds. Meanwhile, the roll-up zippered door is a nice touch for easy access.


Final Conclusion

Growing crops and garden plants in a greenhouse is rewarding, especially in the colder seasons and it gives many plants the opportunity to be propagated earlier. The best greenhouse, however, doesn’t have to be the largest you can find because some of us only have so much space. 

Perhaps the most important factors are durability and sturdiness because you don’t want strong winds and heavy rain to damage your hard-grown crops.

All things considered, our top three recommendations are as follows:

Number one is the Palram Harmony Greenhouse because it offers plenty of space for plants, comes with handy accessories, it’s durable and has a 5-year warranty for complete peace of mind. It’s simply one of the best greenhouses currently available while still being affordable to most.

Coming in second is the Palram Mythos Greenhouse, which is slightly smaller and cheaper than the Harmony version which is our best pick and many other features are the same as Harmony’s. And if you’re on a budget, the VonHaus Compact Walk-In Greenhouse with 6 Shelves is a great choice all day long and is a great starter greenhouse if you’re just getting started. Easy to build and take down, this model is strong and includes a high-quality PVC cover to shield plants from the elements. It also comes with a 2-year warranty.

Check out our reviews of the best small greenhouses if you have limited space


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Last update on 2022-03-17 / Affiliate links / Images from Amazon Product Advertising API

Welcome to my site, my name is John and I have been lucky enough to work in horticultural nurseries for over 15 years in the UK. As the founder and editor as well as researcher, I have a City & Guilds Horticultural Qualifications which I proudly display on our About us page. I now work full time on this website where I review the very best gardening products and tools and write reliable gardening guides. Behind this site is an actual real person who has worked and has experience with the types of products we review as well as years of knowledge on the topics we cover from actual experience. You can reach out to me at john@pyracantha.co.uk

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