A small greenhouse can provide an ideal growing solution for people with limited space on their lawn or garden, those who are looking for their first greenhouse, or those who simply want an additional greenhouse to supplement the facilities they already have. They come in many different forms and varieties, and selecting the right one to meet your specific needs can seem confusing. That’s why WhatShed have created this handy guide to help you find the small greenhouse that’s just perfect for you and your plants.
Here at WhatShed we review all kinds of garden buildings, so we know what to look for in a high quality yet small greenhouse. We also wanted to make sure that all the greenhouses featured in our top twenty league table were easy to buy, which is why we’ve only considered models that are sold by the UK’s ten leading online retailers in this area, as between them they account for over 95% of the market.
Once we had our top twenty models we then had to put them into order. It was no easy job of course, but we took into account their price and value for money, aesthetic appeal, durability and build quality.
Our first task when compiling this league table, of course, was to define exactly what a small greenhouse was. We decided upon a building with a base area of no more than six foot by four foot, as whilst this was still large enough to accommodate a good amount of plants for an amateur gardener, it wasn’t so large that it would dominate a garden or take up too much lawn space. We were pleased to find a large selection of greenhouses that met this criteria, made from both metal and wood, and with glass and polycarbonate glazing. From these, we have found twenty high quality examples, all of which have something special to offer the consumer.
Do you still have questions on what greenhouse will best suit your needs? Check out our helpful buying guide to give you some ideas! View our Greenhouses guide
4 x 6 Waltons Green Extra Tall Polycarbonate Small Greenhouse
This small greenhouse from Waltons neatly dispels an enduring myth about this genre of garden building: namely that they have to be plain and insignificant. This caught our eye from the moment we saw it, thanks to the dark green colour scheme applied to the strong aluminium frame. It also represents excellent value for money, especially as it comes not only with the added reassurance of a 5 year manufacturer’s guarantee, but also with a sturdy steel base and a very handy downpipe included free of charge. For these reasons, it was a clear winner when it came to naming our number one small greenhouse that can be bought online in the UK today.
Whilst this has one of the largest base areas of any small greenhouse in our league table, at 1.95 x 1.30m, it’s still compact enough to fit into a lawn of almost any size. We really liked the extra height that it brings with it as well, measuring 2.16m at its peak, as this means that you can store a large number of plants and seedlings inside. The polycarbonate glazing may not have the clarity of many greenhouses we’ve reviewed, but it should still provide the light and heat your plants need to thrive, and with a thickness of 4mm it’s stronger than many that we see.
Halls Green Popular 46 Small Greenhouse
The top two small greenhouses in our league table are both made of green coloured aluminium, and this brings with it a significant advantage over a traditional wooden small greenhouse, in that the framework will need neither painting or staining and it won’t need to be treated with a wood preservative every year. That makes them even better value for money, and that’s one of the prime attributes for this particular greenhouse from Halls. We feel it’s asking price of less than three hundred pounds represents excellent value for money for a greenhouse of this size and quality, and it’s this that helps it climb into such an elevated position.
Once again we found the dark green paintwork of the metal frame to be very pleasing on the eye, and it also helps it blend in nicely with a typical garden background. What makes this stand out from many similarly sized and priced greenhouses however, the base area in this case being approximately four foot by six foot, is that it uses horticultural glass rather than a form of plastic for its glazing. This is not only a sign of quality that we always welcome in a small greenhouse, it also allows for the transmission of even more light, which should bring noticeable benefits to your plants and seedlings.
Eden Aluminium Popular Green Small Greenhouse With Base
This is another small greenhouse with a base area of approximately four foot by six foot, which shows just how useful these dimensions are. For people who want to grow a good number of plants without taking up too much precious lawn space we feel this is an ideal size. It’s another one to feature a green colour scheme as well, which is something that we rate very highly as it means that people can enjoy the benefits that an aluminium framed greenhouse can bring, without having to have something that looks too metallic standing in their garden.
The thing that separates this from the two greenhouse above it however, and from the vast majority of compact greenhouses that we review, is that it boasts the use of toughened glass for its glazing. This allows more light and heat through to your plants than any other glazing material, although we were pleased to find that there’s an opening window in the apex roof as well that allows for easy ventilation on warmer days. Toughened glass is also practically shatter proof, which is why we feel that this is an ideal small greenhouse for people who are likely to have small children playing in the vicinity of the building. It’s not the cheapest greenhouse in our league table, which is the only thing preventing it from reaching the very top, but if this falls within your budget then it’s certainly worth looking at.
BillyOh 4000 Lincoln Wooden Polycarbonate Small Greenhouse
Whilst the top three of our small greenhouse league table is dominated by models that feature aluminium glazing, we now come to a greenhouse that traditionalists will love, and we were very impressed by its stylish Victorian influenced design. Once again polycarbonate glazing is used, which is a cost effective solution that allows a very affordable asking price to be offered to the customer. The substrate that really caught our eye is the timber frame however, especially as the bottom third of the structure is fully boarded, giving it extra strength and stability.
We were pleased to find that smooth planed tongue and groove cladding had been used, as this is not only tough and durable, it also effectively keeps rainwater out because of the interlocking nature of the timbers. We would have liked to see it given an extended warranty period against rot as well, but we feel it should still prove to be durable as long as the customer adds a wood preserver treatment on a yearly basis. We were also impressed by the wide opening double doors that give easy access to the interior measuring approximately six feet wide by three feet deep.
6 x 4 Palram Mythos Silver Small Greenhouse
This isn’t the most stylish or eye catching six foot by four foot greenhouse that we’ve reviewed, and we know that not everyone will be enamoured by its silver metal frame. This has been taken into account when determining its position within our small greenhouse league table, although we felt it had a contemporary look that should fit in well with gardens that have lots of PVC features on show. What it does offer, however, is outstanding value for money, and its price tag of not much more than two hundred pounds for one of the larger greenhouses in this list help it gain a place within our top five.
Once again we have polycarbonate glazing used, and this time it has a frosted effect. This can make it more difficult for passers by to see if anything of value is being kept inside, which in turn can make it a more secure environment less prone to break ins, and yet it still provides over 70% light transmission for the plants inside. Another feature that we liked, especially at such a low price, was the magnetic catch on the single hinged door. It’s not something that we often see on a small greenhouse, and it should effectively stop the door blowing open and shut in windy conditions.
6 x 4 Palram Harmony Green Small Greenhouse With Base
If you want a small greenhouse that is easy to assemble and that can then be left as it is without maintenance and retreatments then this Harmony greenhouse from Palram could be just what you’re looking for. With an aluminium frame, which is therefore free from worries about rust, this is virtually maintenance free, other than an occasional hosing or wash down. It also has the dark green colouring that we, and we know many other people as well, really love, so this could be a great choice if the silver colour of metal framed greenhouses has stopped you taking the plunge before.
Whilst the base area of 1.85m x 1.25m still means that this is a small greenhouse, there’s lots of room for plants to be positioned inside thanks to a ridge height of 2.08m. That’s great news for gardeners with small gardens of course, and they’ll also appreciate the peace of mind that comes with a 5 year warranty period. We were pleased to find that a solid base is provided as standard as well, which isn’t something that we always see but it adds significant value as well as stability. The inclusion of guttering was another feature that we were glad to see.
4 x 6 Waltons Evesham Wooden Small Greenhouse
This is the second small greenhouse in our WhatShed league table to feature a wooden frame, and this one even features the added advantage of a 10 year guarantee against wet rot. This is an indicator of both how effective the initial dip treatment used by the manufacturer is, and of their confidence in the quality and toughness of the components used, even though there is still an emphasis on the customer adding extra coats of wood preserver on an annual basis. With most of the building being taken up by the styrene glazing, however, that shouldn’t be too time consuming a task.
We were glad to find that all of the wood used on this small greenhouse was 12mm thick tongue and groove timber. We’re used to seeing this on high level garden buildings such as sheds, and it gives excellent strength and stability, even in windy conditions. Smooth planed it also looks very attractive, and this will look even more aesthetically pleasing once it has been painted or stained. One feature that particularly impressed us about this greenhouse was the tall single door; with a height of 1.72m meaning there should be enough room to walk in and out without having to stoop down, which is especially good news if you’re carrying plants or bulky items such as soil.
Green B&Q 6 x 4 TSG Small Greenhouse
Once again we have a green powder coated greenhouse that has an interior base area of approximately six foot by four foot, but this particular example has a very different look that makes it the most attractive metal framed small greenhouse that we’ve reviewed. That’s because it has a tear shaped roof that gives it a classic, almost Edwardian feel, despite the use of a durable and maintenance free aluminium frame. We were also very impressed with the 12 year warranty applied to the frame, although the glazing itself is not included in this generous guarantee.
The glazing too, is different to the vast majority of small greenhouses that we’ve reviewed. That’s because it features toughened safety glass rather than the polycarbonate or horticultural glazing that we more commonly see. That brings advantages in terms of security, and greatly reduces the risk of accidental damage to the glazing, as well as creating optimal conditions for the plants growing inside. Such high quality and well designed components don’t come cheap however, and with an asking price of more than six hundred pounds this is the most expensive greenhouse in our league table, which is the only thing preventing it from attaining a much higher position within our rankings.
4 x 2 Grow-Plus Wooden Small Greenhouse
Whilst most of the greenhouses within the top half of this league table have had a six foot by four foot base area that can prove to be surprisingly accommodating, we now come to a truly small greenhouse with base dimensions of 1.20 x 0.62m, or four foot by two foot. That makes it ideal for those who may not be planning on growing a lot of plants, but still wants to be able to grow and nurture them all year round. Despite it’s size it’s also one of the toughest and most durable greenhouses in this top twenty list, which secures it a place within the upper half.
This Grow-Plus small greenhouse is made of wood which has a lean to design, so that it can be placed against a wall to give it extra protection against the elements. That also means that it doesn’t have to take up any lawn space at all, which will be a major boost to those with very small gardens. What impressed us most about this greenhouse is that all the timber has been pressure treated to give it long lasting protection against rot. This gives it a 15 year guarantee, which is as long as any that we’ve seen given with a small greenhouse made from any material, and it was good to find that this guarantee isn’t dependent upon annual retreatments being carried out.
B&Q 6 x 4 HG Small Greenhouse
B&Q are of course a leading and much respected name when it comes to DIY and gardening, so when they put their name to a small greenhouse we expect to be impressed. Thankfully we weren’t disappointed with this six foot by four foot model, even though the silver framework did little to grab our attention at first sight. What we did particularly like about it, however, was that it features horticultural glass rather than polycarbonate glazing. This has excellent light transmission qualities, and we know that many traditional gardeners in particular would not use anything else with the exception of toughened glass.
The use of horticultural glass often leads to a higher price tag, so we were very pleased to find that this comes in at just over the three hundred pound mark. It is this value for money which earns this the final place in the top half of our small greenhouse league table, especially as extra value for money is also provided in the form of a 12 year guarantee on the frame. We were also pleased to find that not only a base is included as standard for this price, but also an integrated guttering system. This allows rainwater to be collected and then used to water the plants, creating a greener watering solution.
Eden Supreme Small Greenhouse Wall Garden
This is the first wall garden to feature in our small greenhouse league table, but in many ways they are ideally suited to this category. That’s because they are typically less expensive than a stand alone or even lean to greenhouse, and yet they are also often attractive to look at and can fit more plants inside than you might think at first sight, and can also become a garden feature in their own right.
That’s certainly the case with this Eden wall garden which has a width of 1.93m and a depth of 0.71m. We were impressed by its peak height of 2.07m, and as it comes with three twin sets of staging as standard, it’s ready to use as soon as it’s assembled. This integrated shelving also helps to ensure that the customer can make the most of all the vertical space that’s available. What we found most impressive about this wall garden, and what elevates it above other examples that feature further down our league table, is that it uses toughened safety glass. This means that the glass should prove to be just as reliable and durable as the metal frame, which we were pleased to see is itself covered by a 10 year structural guarantee.
4 x 2 Palram Lean To Small Greenhouse
This is one of the more compact examples of a small greenhouse in this top twenty league table, with a base width of 1.29m and a base depth of 0.71m, accompanied by a peak height at the top of the pent roof of 1.65m. That makes this suitable for people who have very little, or even no, lawn space available, and we can imagine this being a perfect first greenhouse for somebody who has just moved into a new home or taken up gardening as a new hobby.
With its silver coloured aluminium frame, and polycarbonate glazing, this certainly isn’t the most stylish small greenhouse that we’ve reviewed, but it is possibly the best value one, which helps it gain its position near to the half way point in our list. With a price of not much more than a hundred pounds it makes the advantages of a tough and reliable small greenhouse available to just about anyone, and for such an affordable price we were both surprised and impressed to find that it comes with a 5 year guarantee. We also liked the sliding door, making access to the interior very easy, and the fact that the roof can be lifted up like a lid to give extra ventilation.
Halls Popular 46 Silver Small Greenhouse
This four foot by six foot aluminium framed small greenhouse follows the same basic design of the greenhouse occupying the runner up spot in our league table, and yet the difference in ranking can be put down to the silver colour scheme on this occasion which we know many people will find a little too plain or metallic looking for their taste. If you’re a fan of metallic garden structures, however, or if aesthetic appeal isn’t one of your main priorities when selecting a greenhouse then you may want to put this one much higher up your own shortlist.
There’s no doubt that this small greenhouse is very well made, as we invariably find with those models manufactured by Halls. One indication of this is the inclusion of integrated guttering and a downpipe, which the more environmentally conscious gardeners will find especially pleasing. We also liked the smooth sliding single door, which with a width of 0.60m is more accommodating than on many of the compact greenhouses that we review, and it also means that it’s easy to open and close even if you have your hands full of plants at the time. With horticultural glass used in preference to polycarbonate glazing as well, it’s no surprise that this is popular by nature as well as by name.
Rowlinson Hardwood Small Greenhouse
This small greenhouse from Rowlinson, the maker of many high quality timber sheds that we’ve reviewed, is unique in many ways, the first of these being that this is the only greenhouse in this league table to have a base area of approximately five foot by four foot. It also has a lean to design incorporating polycarbonate glazing, but rather than having a metal frame as we would usually expect it has a frame made of hardwood timber. This provides a very stylish look that belies its low asking price of less than two hundred pounds, and it’s this winning combination that earns it a place inside our top twenty list.
Being made of hardwood, the frame is not only very eye catching it’s durable and weather resistant too, although it will need to be treated with wood preserver on a regular basis by the owner. We were pleased to find that the hardwood timber was FSC certified as well, showing that it comes from a sustainable source. We were also impressed by the inclusion of two shelves as standard, and the lifting pitched lids which can then be locked in place to provide ventilation. It’s only the provision of a one year guarantee, rather than the extended one we would have liked to see, which prevents this from achieving a place in the top half of our small greenhouse league table.
6'4 x 2'2 Halls Wall Garden 62 Greenhouse
If your garden is in an exposed area that’s often subjected to strong winds and blustery conditions then this cheap six foot by two foot lean to greenhouse from Halls could be an ideal plant growing solution. That’s because it fixes directly onto a retaining wall, or ideally a garden wall. This helps to protect it from wind, snow, and rain, and it also means that it should feel very strong and stable when it’s assembled and affixed. We could also easily imagine this being fixed onto a patio or even a balcony area, so that people with very limited garden space can now grow fruit, flowers and vegetables all year round.
We were pleased to find that horticultural glass is supplied as standard in this small greenhouse, and even more pleased to find that for an extra £74 this can be upgraded to toughened glass. This allows the customer to choose something that’s a perfect fit for their garden and for their budget, which is always something we welcome. There are also staging options, and even the opportunity to add a miniature greenhouse heater, so if you want a small greenhouse that’s also highly customisable then this could be your perfect choice at what is a very reasonable base asking price of just over two hundred pounds.
BillyOh 5000S Easy Fit Aluminium Green Small Greenhouse
There are lots of metal greenhouses available in the BillyOh range, so we were pleased to find that their small greenhouse, the 5000S model, has the same good looks and high build quality that we’ve come to associate with their larger models. With a width of 1.85m and a depth of 1.22m this is still compact enough to fit in most small sized gardens, and yet it’s still large enough to provide an all year round growing environment for a sizeable collection of plants.
One of the things that we liked most about this small greenhouse is just how easy it should be to fit together. If you find the task of assembling your own greenhouse daunting, even a relatively compact one such as this, then you can likely leave those concerns behind. The glazing simply slides along the frame and then snaps into place; not only is should this be a very quick and foolproof procedure, it also means that you won’t need to use any special tools during the installation procedure. We were also pleased to find a strong and sturdy frame included, and that it came with ground spikes to make the installation of that vital component easy as well. All in all then, this isn’t the cheapest six foot by four foot greenhouse, which accounts for its ranking, but it does have a lot to recommend it.
Mercia Wooden Small Greenhouse Store
Here we have a small greenhouse made out of wood that has a unique look all of its own, and it also fulfills two functions in one compact garden building. We were struck at first sight by the original and attractive design of this greenhouse, and it resembles the sentry box style garden storage sheds that we often review. This is shown by the compact base dimensions of 1.16 x 0.63m compared to the peak point of the apex roof which is 2.01m. It makes this an ideal purchase for those who only have a small corner of the garden in which to site a greenhouse, and yet the generous vertical space means that you don’t have to compromise on how many plants you can fit inside.
We were pleased to find that there are two shelves included as standard on which to place pots and seed trays, and we also liked the way that the bottom third of this small greenhouse can be used as a secure store, being covered as it is by tongue and groove boarding. We were also glad to see that these timbers are covered by a 10 year guarantee, even though this is dependent upon an annual treatment schedule being adhered to by the customer.
4’3 x 2’2 Halls Small Greenhouse Wall Garden
This is the smaller version of the silver coloured Halls wall garden that featured earlier in our league table, with a base area of 1.30 x 0.67m, and its smaller storage and growing capacity accounts for its lower ranking. It also, however, comes with a lower price tag, so this could be an ideal purchasing choice for those who want a low cost greenhouse for a relatively small amount of plants. Alternatively we can imagine this being used as a supplementary small greenhouse to a larger one, with plants being transferred from this one as they grow.
One of the great benefits to the use of a wall garden such as this one as a small greenhouse is that they not only make a protective environment in which to grow and nurture plants, they also make an excellent display cabinet for them. Whilst it has to be said that the bare design is less than eye catching, the profusion of glass when compared to the minimal amount of aluminium framing means that it can look spectacular is used for flowers in bloom. On the downside, we would have liked to see an extended warranty provided, but with rust free aluminium and tough polycarbonate glazing used, we feel it should still prove to be a durable structure.
Multi-Pro Small Greenhouse
Like many of the small greenhouses to feature in the bottom half of this league table, this features a lean to design that should ideally be sited next to a supporting and protecting wall. This makes it a less flexible small greenhouse than the stand alone models we featured earlier, but if you want a greenhouse that can be used without taking up any lawn space at all then it could be a perfect purchase. This Multi-Pro greenhouse has a base width of 1.08m and a base depth of 0.65m, so we can easily imagine it taking its place on a patio, balcony, or even decking area.
We liked the inclusion of three shelves as part of the standard package, and with the sliding door it’s easy to reach them and to transfer plants in and out. Polycarbonate glazing has been used, which we weren’t surprised to see given how affordable this small greenhouse is. We were glad to find that it has a UV coating added to it, so the glazing won’t yellow or discolour over time. It’s worth noting, however, that the polycarbonate used in this instance is not completely clear, so it may not be ideal if you want a lean to greenhouse that can also be used to display your plants in.
4 x 2 Halls Green Aluminium Small Greenhouse Wall Garden
We found this small greenhouse to be more attractive than many of the other wall garden style structures we’ve reviewed, thanks primarily to its use of a dark green, almost British racing green, colour scheme as opposed to its natural silver metallic look. It’s a little touch but one that we feel makes a real difference visually, and the powder coating also gives an extra protective layer against rain and snow. On the other hand, this green model costs over forty pounds more than the silver coloured version, which along with the absence of an extended warranty sees it take the final position in our league table of the twenty best small greenhouses available online in the UK.
We still feel that this small greenhouse represents good value for money, however, especially as it features horticultural glass rather than cheaper polycarbonate glazing, and we were pleased to see that the option to upgrade to toughened safety glass is still available with this smallest model in the Halls wall garden range. With everything from thermometers, to heaters, to irrigation units also available, this can quickly become a high end, if compact, growing environment for your plants, although of course these options will also add significantly to the purchase price.