Best Backyard Greenhouse Kits in 2021- [Reviews]

The idea of a greenhouse isn’t from the 20th or the 21st century. It goes back a couple of hundred years in Leiden, Holland. French botanist Charles Bonaparte is known to be the first man to build a complete modern greenhouse in the 1800s. Since then, it has been used all over the world, especially in cold regions.

And it isn’t only limited to botanists nowadays. As per the American NGA, every 35 people out of 100 now use a greenhouse in their backyards. To get the most out of it, you need the best backyard greenhouse.

Of course, there is no shortage of options from big greenhouses to small PVC greenhouses. In this article, we’ll focus on backyard greenhouses that are catered to people with smaller spaces.

Top 5 Best Backyard Greenhouse Reviews

In this section, you’ll be getting to know, what I think, are the 5 backyard greenhouse suited to cold climates. Check their pros and cons to see which will serve you better.

  1. Best Walk-in Greenhouse for Backyard GardeningHome-Complete HC-4202
  2. Best Mini Greenhouses for Backyards Gardener- Nova Microdermabrasion Mini
  3. Best Backyard Greenhouses as Portable Version- CO-Z Lean-to Greenhouse Walk-in
  4. Best Hobby Greenhouse for Backyards- Gardman R687 4-Tier Mini Greenhouse
  5. Best Backyard Greenhouse for Vegetables- TOOCA Mini 4-Tier 27″ X 19″ X 63″ Portable

1. HomeComplete- Walk In Greenhouse Backyard Gardening

Home-Complete

If you don’t have a lot of room, and looking for more of a portable solution to grow your plant, then take a look at this walk-in greenhouse from Home-Complete. This is to say that, don’t expect it to deliver high performance. Here’s a short overview –

What You’re Getting

From the outside, it looks nice and simple. And it is, but it might be too simple for some. Firstly, the overall construction of the glasshouse has galvanized steel, plastic and polyvinyl chloride. This means this is a polycarbonate greenhouse that suitable for any type of backyard. Also, the pipes are made of steel alloy, but the connector pieces are from plastic. Then, you have the PVC cover with no ventilation.

The only ventilation you have is the front zipper door. You can make some artificial pockets as some of the customers were forced to do so.

Then, there are 8 shelves to keep your plants and pots on, and these seem to be quite sturdy. You’ll also be getting zip ties to tie the shelves tightly to prevent disjointing.

The Performance

In terms of actual delivery, it’s not the best, but there are worse alternatives out there. The plastic covering is durable for a couple of seasons unless there are external factors involved. Don’t expect more than 2 years out of it.

During the summer season, the inside can get very hot, as in 100°F hot. So, pick your battles wisely. I’d suggest using this only in the winter season and keeping the door open a lot in the summer.

It will get tipped over under heavy wind, but most of the time, it seemed to end up in one piece. Ground it in cement for stability.

Pros

  • Steel pipes
  • Durable PVC cover
  • Affordable
  • Sturdy shelves
  • Easy assembly

Cons

  • Plastic connectors
  • Heavy wind will tip it over

2. Nova Microdermabrasion- Small Greenhouses for Backyard Terrarium

Here, we have the much affordable Mini walk-in outdoor indoor greenhouse from Nova Microdermabrasion. I’d say this greenhouse is for those who’re looking to start experimenting with the greenhouse culture. It’s cheap, and it does enough for a beginner.

What You’re Getting

For the price you’re paying, there are enough goodies in the package. For starters, the frame is all metal, a steel alloy. The connectors are durable plastic in usual conditions. Then the main part, i.e., protection shield, is made from Polyethylene, and it sounds as you’d expect.

This PE cover has a grating design with the gaps filled up with thinner PE. Will these be able to hold up?

There are 8 shelves in total with grated racks. These will hold your plants and pots fine; use zip ties to hold them in place.

This one, too, has no ventilation system except the front zipper door.

The Performance

So, the strength of the PE comes into question here. In short, in uninterrupted use, it will only last one year on average. For the price, don’t expect anything more.

You can increase the longevity by taking it down every 3-4 months because the PE isn’t strong enough to withstand weather resistance.

Pros

  • Cheap
  • Steel skeleton
  • 8 sturdy shelves
  • Portable
  • Lightweight

Cons

  • Less longevity
  • Plastic connectors

3. CO-Z- Best Backyard Portable Greenhouse

This is a much smaller greenhouse than the previous two with a similar build, but we think it has a better design overall for the backyard greenhouse. It’s as affordable as they come and with the promise of delivering.

What You’re Getting

The overall design of this greenhouse is what I like about it the most. It’s a ‘lean-to’ shaped tent, so it’s easier to attach it to some stronger construction like your house.

One side is completely straight, and that is the ‘leaning’ side, and the other side is curved. This curvature is something to appreciate because of how it endures wind better.

Next, you have the polycarbonate greenhouse with polyethylene cover with a kind of mesh design. But the mesh itself isn’t porous, and the holes are filled with thinner PE material. It’s waterproof and UV-proof. The door is the only ventilation.

The number of shelves in this tent is 3. You’re getting only one rack, which is understandable due to the smaller size. Zip ties are given to tightening the joints.

The Performance

How does it perform? Well, it performs as it should at the given price range. The skeleton itself is durable enough as its steel construction. But plastics are always a weak point.

These types of PE shields have a weakness with longevity. The PE material inside the mesh doesn’t last more than a year. It just simply falls off. So, you’ll need a replacement to unfold unless you dismantle it every 4 months or every season. It can get hot during summer depending on where you live. So, make sure to check it up.

Pros

  • Cheap
  • Lean-to design
  • Curvature holds up against the wind
  • Steel pipes
  • Lightweight and portable

Cons

  • The covers have short longevity
  • Plastic joints

4. Gardman R687 4- Best Hobby Greenhouse for Backyard

The urge to grow plants and flowers can be tough to satiate if you have no space in your house, let alone have a yard. But that can be solved with a 2 feet wide greenhouse. This mini greenhouse from Gardman is small enough to fit on your balcony.

What You’re Getting

First of all, this isn’t a walk-in greenhouse. It’s only 27-inches wide, 18-inches deep, and 6-feet long. The structure is maintained through a selection of galvanized steel base pipes colored in black. And during assembly, it uses plastic connectors to hold it in place.

It’s UV-resistant and waterproof. In terms of durability, it isn’t something that will blow your mind.

You’ll access the inside through the roll-on zippered door at the front, and it’s also the only ventilation pathway.

About shelf space, there are 4 shelves, all with the same dimensions as the tent’s width and depth. These are durable wire shelves.

The Performance

When you weigh its performance, keep its low price point in consideration. In usual conditions, you don’t have to worry about its structural integrity. Light winds are not its enemy. A bit more windy weather will topple it over if you don’t ground it. Plastic connectors will not be able to hold it in one piece, so there’s that.

The PE is strong enough to withstand the weather changes throughout the year. It lets in natural light transmission more than PVC. You can expect 1 year of perfect service. Keep the door open in summer unless you want your plants to die.

Pros

  • Affordable
  • Doesn’t need too much space
  • Durable in normal conditions
  • Perfect for beginners
  • Easy setup

Cons

  • Strong winds will destroy it

5. TOOCA-Backyard Greenhouse for Vegetables

For those who have very little space to work with, this TOOCA mini portable greenhouse is a good option. In terms of size and price, it’s the same as the previous one but with better materials. And perfect for the home gardener.

What You’re Getting

The frame of this tent is made from steel, and it’s sprayed with anti-rust and anti-corrosion coating. It’s going to take more than some rain to weaken it. I’d have liked the connectors to be not plastic, but at this price, you can’t complain.

To protect your plants, it uses a PVC cover, which is more durable than PE material. But it’s a bit less translucent than PE. It’s bug-proof, waterproof, and UV-proof. For accessing the inside, it has a roll-on zippered door. No extra ventilation is in place.

Portability becomes much easier as it weighs very little with a dimension of 27-inches in width, 19-inches are in-depth, and 6-feet in length. As the standard for these types of greenhouses, it has 4 shelves in total. These shelves can tolerate up to 11lbs of the load.

The Performance

It performs as you’d expect, nothing too out of the ordinary. The steel frame holds its own pretty well even after light duress from the wind. Tie to a wall to increase longevity.

The PVC cover is stronger than a PE material, so your plants will be safe for more than a year. Then, it may start to show signs of wear.

Pros

  • Value product
  • Durable PVC cover
  • Steel frame
  • Lightweight and portable
  • Requires small space

Cons

  • Needs support as it’s not durable on its own
  • Limited space

What to Look for Backyard Greenhouse kits?

best Backyard Greenhouse

The days of the commercial-only greenhouse are over. People are coming up with different backyard greenhouse plans all over the world.

With this in mind, the corporate people have brought forward loads of products. Are they all good enough? You can’t just do a lottery and choose one. So, how do you choose the best outdoor greenhouse? There are factors to consider before buying a greenhouse.

As I said, there are lots of options in the market. So, the first thing to ask yourself, “What am I going to do with a greenhouse?”

If you’re a pro, you need a different type of greenhouse than someone who’s only contemplating the idea. Keeping this in mind, here are the main types of greenhouses and inside environments,

Starter Greenhous

This is for amateurs. These are simple and fun to build that doesn’t take up a lot of space. It could be a fun little project with your kids. Even if you don’t succeed, you are not losing much.

These are great ways to store and culture new plants as well as storing crops during winter! These can be used in three ways, such as,

Cool Greenhous

Although these have a different name, these cool greenhouses are small to medium in size and quite affordable. The main characteristic of it is that the temperature is kept in the range of 40-45 degrees Fahrenheit. People generally use them as nursery greenhouses to grow starter vegetables and plants during winter.

Warm Greenhous

Again, these starter greenhouses are used for different purposes. You’ll keep a temperature of 50-55 degrees Fahrenheit in this greenhouse. And this range allows you to grow your normal outdoor flower and vegetable you’d grow during summer.

Hot Greenhouse

Here, the temperature is kept between 65-70 degrees Fahrenheit. The intention is clear; it is to grow tropical plants and exotic fruits. Temperature is maintained through heaters and grow lights.

Multiple Design in Backyard Greenhouse Kit

Now, the backyard greenhouse kit can be of different shapes and designs as well. For example,

Free Standing Greenhouses

This type of greenhouse is made to stay tall without any external support. Sometimes, though, people use strings to ground them in place for stabilization. They generally have 4 corners and a curved or corner roof. These tents get the sunlight directly. Let’s learn How Much Sun Does a Greenhouse Need?

Lean-To Greenhouses

The lean-to type of greenhouses has a design that has one straight side and a curved side. You’ll need to attach the straight side with a wall to give it stability. It’s very weak on its own. Attaching it to your house’s back wall is a good idea. It doesn’t take up much space. These do receive less direct sunlight due to the attachment to the wall.

Octagonal/Hexagonal Greenhouses

Octagonal/hexagonal greenhouses have 8/6 corners; that was obvious. These generally come in much stronger and bigger frames than the freestanding and lean-to houses.

So, you can’t put this type in a starter category. I’ll be honest; for backyard purposes, this isn’t a good fit. They are more like the centerpiece of a big garden, as we saw in the movie Harry Potter.

The Material of a Backyard Greenhouses: Which One Suits You the Most?

There are mainly two parts to a basic backyard greenhouse: the frame and the covering. In terms of frame material, you have three choices overall.

Metal

I’ll be blunt here. For starters, metal is the best option. It’s the cheapest option, which is also strong and durable. Yes, it’s heavier, and that’s a point in your favor.

Unless a big storm passes, it won’t lose its shape. They come in various colors and are almost always sprayed with anti-rust coating. And that reduces the maintenance hassle you may be thinking of.

Aluminum

Greenhouse with aluminum frames are much lighter, and that makes their portability a big plus. But there’s the high cost of aluminum. Seemingly, it does let in more light due to its finer structure. I reckon it’d be a hefty investment for beginners.

Wood

This is for the pros. Wooden frames are regarded as the best and more preferable method to build a greenhouse. No argument there, but it’s a high cost and high maintenance option. It’s also the heaviest and hence the strongest option. I know most of you would be dreaming of having one.

But it isn’t sold as a package, especially online. Gain a bit more experience and get more space for this to happen.

Greenhouse Cover Material

Now, regarding the covering to be used as protection and also as insulation, there are quite a few choices. But I’ll focus on beginner-friendly starter options here, and these are all UV-proof and waterproof.

Polyvinyl Chloride

PVC or Polyvinyl chloride is the most used material in starter greenhouse covers. There are mainly two reasons; low cost and durability.

This material doesn’t cost much, and it can be recycled back. And they last 5 years in the outside environment on average. This is a good period for someone to get their foothold in the greenhouse culture.

Polyethylene

We don’t prefer Polycarbonate panels as it doesn’t dissolve easily. Nonetheless, this is a good cover material for a greenhouse. Although it is 5% less strong compared to PVC, it’s still durable enough to last 2 years on average.

Both PVC and Polyethylene are more preferable due to their simplicity. It makes assembling the greenhouses easy and swift, unlike the options below. That being said, these aren’t UV-protected, it may break the structure. You’ll need a replacement.

Safety Glass

Completely shatterproof safety glass could be your budget-friendly premium option. It doesn’t degrade under UV light. And it’s safe for children.

Acrylic

If you have the budget, you can go for an acrylic cover. Maybe it could be your replacement cover when the PVC breaks down. These are much more expensive than polymer options. Cost-wise, this falls between Polycarbonate and Styrene.

Styrene

Styrene is quite strong, almost two times to safety glass. It’s the cheapest plastic polycarbonate glazing solution but still more expensive than your friendly PVC/PE options.

Other Factors to Consider

Apart from environmental and structural factors, there are factors like ventilation, insulation, etc., that you’ll have to consider before setting up.

Cover Clarity

The clarity of your greenhouse cover can matter, especially for sunlight. Opaque or diffused covers let in less light than a clear see-through cover. PVC is more on the opaque and translucent side as opposed to Polyethylene.

Glass and acrylic can be of both types depending on the construction. Of course, the better option is to have a clear cover unless you want to control the temperature inside.

Ventilation

Your plants need to breathe. But also it needs to be warm during winter. To manage this, you need a good ventilation plan. Unfortunately, mini-greenhouses don’t have separate windows for ventilation. The zipper doors are the only way to let air in. So, you’ll have to maintain a schedule. You can customize and make little windows on the sides to let in the air.

Insulation

In the colder regions, insulation will be a must during winter. If your cover isn’t enough, you can use a second cover and put insulation between them. A good and cheap insulator is bubble wraps.

Also, in some garden centers, they have UV-stabilized Polyethylene bubble wraps. Twin wall polycarbonate greenhouse is better than glass in terms of insulation.

UV-Protection

All cover material will protect your plants from UV rays. But what will protect them from UV rays? Some of the more expensive materials, such as glass, polycarbonate, or styrene, are not damaged by UV rays. But PVC and PE are prone to damage.

You can use light acrylic color or latex paint to spray on the PVC/PE cover. It’ll significantly increase their UV resistance.

Also, check Best Place to Put a Greenhouse

Final Verdict

As you’ve seen from the reviews, there is much to appreciate about mini-greenhouses with very few hiccups. Of course, glass greenhouses are the optimal way to go. But if you haven’t got much space inside or outside your house, these are your best bet at growing plants and producing flowers and vegetables.

Those who are starting their greenhouse journey shouldn’t break a sweat over choosing the best backyard greenhouse. Start small and affordable. Take any of the greenhouses from the shortlist above, and you won’t regret it.

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