Click at the star to rate this articleThis article has been given a 4.2 rating based on 8 ratings

Not everyone has the luxury of a nice, spacious garden to live out their botanical fantasies in. So what can you do when your green fingers are twitching but you just don’t have the room for a normal sized greenhouse? Perhaps you want to keep your tomatoes in tip top nick? Mini greenhouses are just the ticket!

The solution is to get your hands on one of the best mini greenhouses. It doesn’t matter if you have a tiny garden, or live in a flat with no garden at all, there are products out there that will facilitate your need to grow your own plants, flowers, and herbs while taking up as little space as possible.

These mini greenhouses come in a wide range of sizes, with varying numbers of shelves, and being constructed from materials such as plastic, wood, and metal.

To help you figure out which products stand out from the crowd, and also which ones are best suited to your needs and living situation, we have put together this page that features product reviews and also a buyer’s guide.

Best mini greenhouse

We’ve taken a closer look at the best-selling mini greenhouses you can buy online at the present time, and given our honest opinions on them. If something isn’t up to scratch, we’ll let you know about it, but we will also give credit where it’s due.

Due to Covid-19, the products that were available to review were limited somewhat, but we still think we have a good selection for you here.
Let’s kick things off with a review of the best-selling Songmics mini greenhouse.

UK’s Best mini greenhouse for tomatoes based on quality and value 2020 [Summer]

ImagesMake & ModelManufacturer Features/SpecificationsRatingPrice

SONGMICS 4-Tier Mini Greenhouse Planting Shed with Flowerpot Shelves

  • Ideal for Plants - A small greenhouse can prevent cold weather damage and preserve warmth and sunlight for plants;...
  • Stable and Sturdy - Solid structure of powder-coated steel tubes; diameter of 16 mm and thickness of 0.32 mm;...
  • Durable PE Cover - Greenhouse made from 140g/m² PE; green inside grid make is strong...
  • Easy Assembly and Access
  • Multiple Uses - Lightweight and easy to move; fits in balcony

4.6/5 from 177 reviews

Grow It Gardman Wooden House

  • Ideal for growing a selection of ornamental and vegetable plants that need protection...
  • Provides a sheltered, light growing environment
  • Slatted shelves for easy drainage and hinged lid with locking stays for ventilation...
  • Twin wall polycarbonate glazing
  • Made from FSC certified Timber

4.3/5 from 244 reviews

Kingfisher GHPRO Premium 4 Tier Greenhouse - Clear

  • 4 tier greenhouse
  • Roll up door with zip fasteners
  • Size H130 x L50 x D45cm (51 x 20 x 18in)
  • Weight : 3.82 Kg
  • Brand : Kingfisher

4.2/5 from 712 reviews

1. SONGMICS 4-Tier Mini Greenhouse Planting Shed with Flowerpot Shelves

Priced sensibly on Amazon, this Songmics 4 tier mini greenhouse might cost you a little bit more than similar products like the Gautzsch Siena garden model, but if you ask me, it’s definitely worth spending the extra if you can afford it.

Standing 69 x 49 x 158 cm (W x D x H), with four iron mesh shelves, each being able to hold about 15kg worth of plants, you have enough space to grow a decent variety of plants, and any of the shelves can be removed to give more space if needed.

The frame is made from 0.32mm thick powder coated steel pipes that are 16mm in diameter, held together by hardy polypropylene connectors. This frame is covered by a plastic mesh, but unlike some other, cheaper products, this mesh cover is made from 140g/m polyethylene, making it much stronger and durable than transparent plastic covers used by some this mini greenhouse’s competitors.

To help with stability, the mesh cover has been made so that there is 10cm worth of free material at the bottom, and this is supposed to be used to help anchor the greenhouse into the ground. A nice little touch if you ask me.

The large front door features a good quality resin zipper that works very smoothly, and a door design that rolls all the way up to the top, providing a lot ventilation.
This is a good thing because if left fully zipped up, a lot of humidity can build up inside due to the thickness of the mesh cover. This could be problem if you forget to open up the door in the warmer months, but in winter the cover does a great job of protecting the plants inside.

Like most mini greenhouses, this one was a doddle to set up, although I would recommend having a rubber mallet or something that can act as a substitute to help assembly along. The instructions that came with the Songmics mini greenhouse weren’t really any good, but that’s par for the course these days. It wasn’t a problem though as common sense is all you need to put this thing together.

While still not what I would call ‘premium quality’ (what can you except for such a low price?) it does have enough features that place it high enough above some of the other mini greenhouses in the same price range to warrant paying a bit more for it.

it’s more stable, has a better quality cover, higher quality zip, and a thicker frame and connectors. I think that’s worth an extra ten to fifteen pounds, don’t you?

2. Grow It Gardman Wooden House

One of the main complaints I hear about mini greenhouses is that they can be quite susceptible to the wind, and in a place like the UK, where we get more than our fair share of not so mild gusts blowing through, I can see why some gardeners get annoyed.

The problem is that often the best place for sunshine in a garden, is also the least protected by the wind, so your choices are either anchor your mini greenhouse down, create barriers to block the wind, or go for a heavier, wooden version like this Gardman wooden house from Grow it.

The Gardman mini greenhouse is a 110 x 57 x 76cm FCS certified timber construction with polycarbonate windows to ward off that winter chill. It makes a great place for your summer plants to be protected in until the weather changes for the better and they can go back out in the open.

The polycarbonate glazing is double layered and provides a good level of insulation. This is backed up by the good fitting doors that close up tight without huge gaps letting draughts in.

The reason that not just the doors but all components line up well is that this flat pack has been well engineered and the pre-drilled holes give a good level of alignment throughout the mini greenhouse which is something often lacking in cheaper models. This also makes assembling the product incredibly straightforward and quick, and doesn’t require much more than a good Phillips screwdriver.

Inside the mini greenhouse doors you will find three tiers to place your plants upon, with the two upper shelves also being made out of wood and having a clever slatted design to help with drainage of excess water.

These shelves play a major part in the solidity of the overall structure of the greenhouse and so it isn’t a good idea to remove them. This does limit the height of the plants you can grow on the lower two tiers, but hinged lid can be opened up wide to allow taller items on the top shelf.

A word of advice, if you do decide to go with this wonderful wooden mini greenhouse, invest a couple of quid in some finish like creosote or wood stain and give it a nice coat, as this will help to fight of any damage caused from the weather and insects.

This product impressed me and I think it would make a wonderful addition to any garden, not just small ones. It arrives quickly, can be assembled in an hour or so, and with a bit of coating, looks fantastic.

3. Kingfisher GHPRO Premium 4 Tier Greenhouse - Clear

It’s quite common that the problem with smaller gardens and balconies is more to do with the lack of width than that of height, and if this rings true with you, this Kingfisher GHPRO four tier mini greenhouse could be right up your alley.

Standing 130cm high, but only 50cm wide and 45cm deep, this mini greenhouse fits nicely into any crook or corner and won’t have you tripping over it or feeling too cramped.

The narrowness is nicely balanced out by the four tiers of wire shelves which still provide you with enough storage space to keep and grow a good selection of smaller plants.

If growing larger plants or flowers is more your thing, you don’t have to buy a different mini greenhouse, you can just remove some of the shelves to suit your purpose. The shelves are really easy to take out and also to reinsert so you can swap and change whenever you feel like it.

I’ve seen some reviews of this product where they complain that it is a little flimsy, and while I can see their point to some degree, you also have to keep in and that this is a very low cost product that has been designed to be lightweight (under four kilograms) for ease of assembly and transportation.

Actually, I wouldn’t call the Kingfisher GHPRO mini greenhouse flimsy as that implies it was supposed to be super strong but failed.

It is quite similar in sturdiness and build quality to most of its closest competitors of similar design. These mini greenhouse are very lightweight, and are meant to be weighed down by the plants inside them, or anchored down, not withstand gale force winds freestanding while empty. If you want that then you should look at a wooden mini-greenhouse like the Grow it Gardman model.

The Kingfisher GHPRO comes with a transparent plastic cover that can keep pests away or provide protection from cold winds. In the hotter months it can be unzipped and opened, or even removed completely to reduce the temperature for your plants.

Costing only £39.99, this easy to assemble mini greenhouse is a very affordable substitute for people who can’t have that full size model.

4. Gautzsch (FO) Siena Garden 569128 3 Level Conservatory

In direct competition with the Kingfisher GHPRO is the Sienna garden mini greenhouse from Gautzsch. It has a strikingly similar design, if in slightly different dimensions, and sits in the same thirty to forty pound price bracket, albeit at the lower end of the scale.

If you put this mini greenhouse side by side with the Kingfisher, you wouldn’t think that this is the cheaper product. Its tubular steel frame is more robust, and also weighs more than its competitor at 6.5kg. That’s still super lightweight though, and you’ll need to anchor it down in strong winds.

While the Kingfisher stands tall and narrow with four tiers of shelves, the Siena garden mini greenhouse only has three tiers, but they are wider at 70cm, and overall you can fit the same amount of plants in both models.

The shelves are removable, just like with the Kingfisher

Where the Gautzch product falls behind the Kingfisher is with the transparent plastic cover. Quality-wise, it’s probably on par, but I found that it just fitted a little too tightly over the frame and it made me worry about tearing happening after not too long.

Small things like this are to be expected from a product that costs thirty pounds though, and you can’t really grumble too much. Besides, there are good quality covers that you can buy separately for very little money all over the internet these days, so it’s not the nail in the coffin you would think.

Apart from that, this mini greenhouse does what it’s supposed to. It’s incredibly easy to set up, and you can do it on your own in no time. Then you just place it anywhere you have a bit of space that’ll get some sunshine, pop your little plants on the shelf, and ta-daa! You’re in business.

Before you know it, you can be admiring your home grown flowers, or slipping those herbs into your favourite recipes, and it won’t cost you the earth to do it.

5. Rowlinson HWCOLDFR1 Hardwood Coldframe

If you want to keep those delicate flowers and plants alive during the frostier times of the year, or just want to continue exercise those green thumbs all year round, you should opt for a cold frame.

A cold frame is basically a wooden framed mini-greenhouse that requires no additional heat source in order to keep the contents alive and growing how you want them to.

This 60 x 61 x 80 cm Rowlinson model is one of the best out there, combining a practical design with an affordable price tag.

The pre-treated FSC hardwood frame and double walled polycarbonate glazing are not just an eye pleasing combination, but also provide excellent insulation for your green wonders encased inside, sparing them from the harshness of the frost and wind chill.

Inside this wooden mini greenhouse are two tiers of slatted shelves, but these shelves are really wide and deep and you can fit a lot on them. They have a slatted design to help with drainage and they are good quality, but the plastic parts that are meant to support them could be better.

This mini greenhouse is one of the easiest to put together that I’ve ever had a go at. There are very few parts, and armed with only a Philips screwdriver, I had this up and ready to be filled in a jiffy. There are pre-drilled holes for the shelf brackets to be slotted into, the shelves fit straight on top of them, and then you just screw the lid and doors on. It’s that straightforward.

The good sized, polycarbonate glazed lid can be lifted open and locked in place at various angles, the widest of which will allow for a good amount of direct sunlight and ventilation. The front of the mini greenhouse is a single, large door that opens up from one side and this makes accessing your plants really easy with plenty of space to maneuver yourself to one side while gardening.

Empty, this timber construction weighs about 10 kilograms or so and won’t be blown around, even in strong winds. Once filled with plants, it is obviously heavier, and therefore even steadier on its four legs.

For under a hundred and twenty pounds, you certainly can’t grumble at something as small as some of the plastic parts not being as good as you’d liked, and the quality of the rest of the Rowlinson mini greenhouse definitely makes up for that small flaw.

Overall, this is a great little product, well worthy of consideration.

What you need to know about mini greenhouses

A good mini greenhouse can really change the way you look at gardening. From keeping your favourite plants and flowers alive and kicking through the winter, to being a safe place for your seedlings to take root, mini greenhouses offer lots of benefits to the home gardener. In this section we will take a closer look at what makes the best mini greenhouses stand out to make your decisions a little easier when it comes time to shop.

Mini greenhouse shape and size

A lot of people buy mini greenhouses because they just don’t have the space to fulfil their gardening dreams. For some, it might be that they live in the city centre in a flat, with no garden at all, while for others it might be that they have a smaller property that already has ornaments and such taking up space.

Mini greenhouses can be tall and narrow, or short and wide, and have a varying number of tiers or shelves. You should check out the dimensions of the products you are interested in and then take a tape measure to the intended spot where the mini greenhouse will sit, to see if it will fit nicely. What I mean by nicely is that there will be space not only for the greenhouse, but also space for you to access the contents without a struggle, and also so that the greenhouse doesn’t block your way to anything.

If you’re going to have your mini greenhouse on a balcony, you need to think about how the sunlight will get to plants, and this might alter the type of mini greenhouse you buy.

Material

The two main types of mini greenhouse that you will find are either built of a metal frame with some kind of plastic cover, or a wooden frame with polycarbonate glazing. There are other fully glass models available too, but they are less common.

Metal framed mini greenhouses are quite a bit cheaper than the wooden ones, but they can’t compete with the stability that comes with the extra weight of wooden mini greenhouses. On the other hand, the lightweight nature of them makes them easy to move around and dismantle if necessary.

Wooden models are stronger and sturdier and so won’t be affected by strong winds as much as their metal framed counterparts. However, they usually require a bit more setting up, and can get quite hot and humid in warmer months if the doors and lid aren’t left open. Wooden mini greenhouses are quite a bit more expensive too.

Pre-treated timber

If you are going to buy a wooden mini greenhouse, then check to see if the wood is pre-treated. This means that it already has a special coating on it to fight off things like rot and other dangers that will shorten the working life of the product.

If the timber is untreated but you still have your heart set on that particular mini greenhouse, make sure you buy some creosote or similar and give the wood a good coating before assembling it.

Constructing and using the mini greenhouse

Some mini greenhouses can look very similar in design but that doesn’t mean they are all as easy to assemble as each other.

Things like the quality of the instructions, and how well the predrilled holes align, as well as how well the screws and other components fit all come into play when constructing your chosen greenhouse.

I suggest reading through reviews and customer feedback to see what people are saying about putting these products up, and if you see a number saying that it is a nightmare, do yourself a favour and look elsewhere, as there are plenty of products on the market that have been designed to be easily assembled.

Consider a greenhouse heater for the colder months, this way you can keep growing all year round! You want to site the heater early on in the install so you can decide on a final layout with the remaining space.

Shelf capacity

It is important to know not only the size and dimensions of the shelves, but also what the maximum weight they can handle too.

A bare minimum for a mini greenhouse shelf should be about 10 kilograms. Anything less than that, and it’s probably just not worth it.

Also, when loading up your shelves, I wouldn’t do it to the absolute max as these are usually estimates of maximum load, so play it on the safe side and have a few less plants on there just in case.