This greenhouse design boasts exceptional durability and dependability. It can withstand the load of up to 275 kg/m² and will stand stable even against the blasts of wind up to 90 km/h.
The assembly is pretty time-taking.
Distinguished by a well-thought construction, the Palram Harmony will become a real find for a private house or a countryside property with a large garden. Featuring large dimensions, it provides generous growing space to raise flowers and veggies throughout the whole season as well as enough area to set up a mini leisure zone.
208 x 306 x 185 cm
Lockable door handle, Built-in gutters, Roof vent, Galvanised steel base
5 years (limited)
Ultra-reliable TwinWall PC panels work both ways. Providing the plants with up to 70% of natural sunlight, on the other hand, they provide 100% protection from harmful UV rays and won't turn yellow over time.
The window vent opener is a bit flimsy.
The Palram Mythos is suitable for both large and smaller gardens. Its aluminium frame is resistant to corrosion, which ensures the longer service life and allows the assembly to endure heavy weather conditions with ease. Coming in a complete package with all the necessary hardware, it is a cinch to install.
208 x 247 x 185 cm
Twin wall polycarbonate glazing panels, Lockable door handle, Built-in gutters, Roof vent, Galvanised steel base
5 years (limited)
Due to a specific design, the door won't eat up the precious room inside the greenhouse providing additional growing space for the plants. On top of that, it won't accidentally slam shut in case of strong winds.
The roof panels might fail under heavy snowfall.
Thanks to a rugged frame made of rustproof aluminium, the greenhouse from Garden Grow will look great and needs little to no maintenance throughout the whole service life of the assembly. What is more, owing to side gutters, you can collect rainwater and even use it for watering. It's a compact and practical solution for a small garden.
189 x 201.2 x 131.1 cm
Sliding door design, Twin wall polycarbonate panels (4 mm thick), Heavy-duty galvanised zinc steel base, Roof vent, Rain gutters
Amazon's 30-day return policy
The reinforced galvanised base of this model firmly connects to the frame to add steadiness and stability to the whole assembly. Thus, the construction can withstand the wind speeds of up to 43.2 km/h.
The model doesn't have gutters.
With the Outsunny, you'll get a reliable and capacious greenhouse at a reasonable price. Featuring a green coloured frame, it will blend with any landscape design while almost transparent PC panels make it a match for growing flowers and decorative plants. A sliding door will take less useful space and a vented roof will ensure due ventilation inside.
201 x 190 x 192 cm
Strong galvanised base, Sliding door design, Roof vent
Amazon's 30-day return policy
The panels and the frame of this greenhouse can withstand an impressively wide range of temperatures varying from -25° C to +60° C. To add more, they are shock-resistant to easily resist some physical damages.
The installation instructions are not informative enough.
Despite its modest dimensions, the Deuba greenhouse offers decent growing area. With a 3.7 m² footprint, it provides 5.85 m³ of growing space, thanks to higher ceilings. Ideal for space-limited yards and gardens, it has all the benefits of larger models. And you can't but like its fairly affordable price.
195 x 195 x 190 cm
Sliding door design, Twin wall polycarbonate panels (4 mm thick), Heavy-duty base, Roof vent, Additional struts and fixing clips, Rain gutters
Amazon's 30-day return policy
Palram Harmony 6x10 ft
A Great Pick for Larger Properties
If you have a countryside property with a vast piece of land or a private house with a larger garden and look for a reliable and roomy greenhouse to meet your horticultural needs on the all-year basis, the Palram Harmony will catch your fancy.
It is a spacious greenhouse that can be compared to a fully-fledged model. With 185 x 306 cm dimensions, this model provides 4.4 square metres of growing area. Meanwhile, the height of 208 cm will let you use the racks to place the boxes in several tiers to grow more crops and plants.
Moving on to the greenhouse design, the frame of the unit is made of strong corrosion-resistant aluminium and powder-coated for even better weather resistance. The transparent panels feature polycarbonate glazing that makes them damage- and shatter-proof. Although the whole construction weighs only 46 kg, it is highly durable and dependable. The load capacity this greenhouse is meant for is 275 kg/m² and thanks to a galvanised steel base, it can stand stable even against the blasts of wind up to 90 km/h. Hence, it will survive in harsh weather conditions. Yet, to further reinforce the whole structure and add more sturdiness, you can use anchors and stands that are sold separately.
The only issue that did disappoint us, though, is the time it takes to fully assemble the greenhouse. Despite a quite informative instruction manual, there is a great number of parts to put together that will take you about 5 hours. So, we recommend planning the installation in advance. On the bright side, however, the kit has pre-installed gutters to remove excess moisture and a roof vent for improved air circulation.
All in all, this large polycarbonate greenhouse from Palram will be a good pick for large garden owners that tend to grow vegetables, crops, and even flowers throughout the whole year. As functional, rugged, and reliable as it is, it will serve you for really long.
Palram Mythos 6x8 ft
Contains the Warmth Inside
Growing some temperature-sensitive or exotic plants and consistent heat retention is a must when choosing a greenhouse? If so, then the Mythos model from Palram is for you.
At a glance, this greenhouse might seem a bit unusual due to its opaque look. Yet, it is what makes the Mythos special and sets it apart from the others. The thing is in polycarbonate glazing. In this model, the manufacturer applies the twin wall technology. It means two glazing sheets are moulded together with an air gap in between. Not only are such PC panels more durable but also they will better keep a stable ambient temperature for extended periods of time even during winter or in case of cold snaps. Besides, twin wall panels boast 100% UV resistance. They won't fade or change colour over time and prevent harmful UV rays from getting inside. At the same time, your plants will still get up to 70% of useful sunlight.
Owing to a sliding panel design, the whole greenhouse construction is a breeze to install. Just follow detailed instructions and you won't have any issues with the assembly. A rust-proof aluminium frame with a galvanised steel base makes up a strong and rugged framework that will keep the greenhouse securely in place and can withstand the wind load of 75 km/h or so. So, in case you are up for a serious storm, your Mythos greenhouse will handle it.
Roof venting and integral guttering will help create a maximum favourable atmosphere inside the greenhouse for raising the most demanding plants. However, the Palram Mythos has only one gutter, so, for better moisture control, we recommend using additional drainage pipes to avoid excessive humidity.
Wrapping things up, the Palram Mythos will be a good pick for farmers and amateur plant growers who need a relatively large growing area and seek to maintain a stable interior temperature without too many additional adjustments.
Garden Grow D9399A 6x4 ft
Well-thought Design for Home Use
While cheap plastic greenhouses can only last for a while, full-size polycarbonate models are designed to withstand 5 or even more years of service. Fortunately, the Garden Grow D9399A is the model you can count on when it comes down to cultivating plants in your home garden. What makes it stand out are a thought-out design that will let you get the most out of greenhouse gardening and a fairly reasonable price tag that won't hit your budget.
At almost half the price of premium-class models, you'll get pretty much the same set of features. Thus, an aluminium frame with a heavy-duty galvanised steel base is there to provide good stability against the wind and weather elements. The kit also includes built-in side gutters for draining rainwater and controlling the air humidity inside and a manually operated window on the roof for appropriate ventilation and air circulation. The glass-free walls made of transparent polycarbonate perfectly trap the warmth inside the greenhouse. This is achieved, thanks to the twin-wall configuration of the housing normally found in more expensive models.
Another interesting aspect that can't be overlooked is the sliding door. Unlike hinged doors, the sliding door design is more convenient saving the space at the entrance and leaving more useful room inside the greenhouse. Besides, a sliding door won't be shut by the wind when you least expect it.
To conclude, the D9399A from Garden Grow is by far the best polycarbonate greenhouse in the medium price range that provides a safe and reliable space for growing plants in the comfort of your back yard.
Outsunny 845-058 6x6 ft
A Perfect Retreat for Flowers
If you are into growing flowers and other decorative plants in your garden and want to prolong the flourishing season for as long as it is possible, a polycarbonate greenhouse like the one from Outsunny will come to help.
The main advantage of any polycarbonate greenhouse over a glass model is a lightweight design that makes them easy to use and maintain. And this model surely is one of the easiest to assemble as compared to other models in the range. All frame elements are easily put together by self-tapping screws and PC sheets slide into the grooves in the frame. All hardware is included in the set and you'll just need a screwdriver.
The frame is made of light yet durable aluminium that won't rust or rot over time. Painted in green, the frame will easily blend with your garden natural landscape and perfectly fit into any decorative garden design pattern. Polycarbonate panels are almost transparent. Not only do they deliver enough sunshine to sun-loving plants but also they will let you view your flowers in all their beauty.
On the negative side, though, PC boards in this model are much thinner than in more sophisticated polycarbonate greenhouses. The panels are only 2mm thick against 4mm or even 6mm other models offer. Hence, the Outsunny is not the best option for all-year use. However, with a 43 km/h wind rate and UV30 sun protection, this greenhouse is a good choice for regions with a mild climate without harsh storms and winds where the temperature is relatively warm through the year. Otherwise, you'll have to get a greenhouse heater for the cold season.
All things considered, the greenhouse from Outsunny offers great value for the money and will be of great use in warmer regions where the temperature control is not that important and you rather need to create a consistent environment for growing some specific species or decorative plants.
Deuba 6x6 ft
Everything You Need for a Small Garden
This rather small greenhouse from Deuba features all you need to start a small garden in your back yard. With 190 x 195 x 195 cm dimensions, it won't take much garden space, yet, will still allow for placing a big number of plants, veggies, and even flowers. Thanks to the twin-wall polycarbonate panels, the heat won’t escape the greenhouse, thus easily providing the plants with much-needed warmth for long periods of time. In case you don’t need much heat inside, you can always use a special roof vent door to let the fresh and cool air in.
This kit also includes a sliding door, which provides maximum room for all the plants inside without taking any additional space. Moreover, the greenhouse comes equipped with water gutters to save your peace of mind about excessive humidity levels inside the growing area.
Furthermore, the all-weather aluminium frame of the greenhouse features anodised pieces that are exceptionally durable and have corrosion-resistant capabilities. In combination with a rugged steel base, the frame provides better construction strength and ensures a longer service life of the whole greenhouse.
As for the things we somewhat dislike in this model, the instruction manual contained in the set is not detailed enough. Hence, if you are a kind of entry-level gardener, it will take you quite a while to get the hang of the assembly.
All in all, the Deuba greenhouse will meet the needs of any casual gardener and make a perfect addition to any smaller garden or backyard limited in space.
What Is a Polycarbonate Greenhouse?
Unlike glass, polycarbonate has better heat retention capabilities allowing plants to grow steadily without being exposed to extensive sunlight or high temperatures. While polycarbonate can be as transparent as glass, it is not as fragile as glass. Just the opposite, PC panels are more rigid and resistant to damages. These aspects make them easier to install, use, and maintain. Some PC greenhouse models even feature twin walls for better heat retention as compared to single-layer designs that makes them a great option for regions with harsh winters.
The extra features of polycarbonate greenhouses may include gutters for better drainage and air vents for removing dry or hot air from the inside and ensuring due air circulation. It will help create the environment inside the greenhouse that will be maximum close to natural growing conditions.
In case you want to maintain your plants' growth even during nighttime, you can always opt for grow lights. While regular models will enable natural healthy growth of the plant, the LED lights provide the plant with the full light spectrum, including blue, red, and white bands needed for quicker development.