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*Last Updated: October 2021

The 5 Best Polycarbonate Greenhouses [Ranked]

Polycarbonate Greenhouses

Top5Reviewed is reader-supported. When you buy through links on our site, we may earn an affiliate commission.

If you are looking for an affordable but rugged and longlasting greenhouse, a polycarbonate greenhouse might be a good choice for you.

Tough and light-weight, UV-treated polycarbonate is an advanced, and top quality paneling material for garden greenhouses. It's easily obtainable in various thicknesses.

Polycarbonate greenhouses provide you the clearness of glass, but with extra ruggedness and specialized insulation properties.

Polycarbonate panelings possess a fairly lengthy life-span of fifteen years or even longer in most areas- and you can always swap out the panels should they become defective.

Let's take a look at 5 of the best-selling polycarbonate greenhouses on the market today. 

Comparing Them

Bestseller No. 1
oneinmil Polycarbonate Walk-in Garden Greenhouse with Adjustable Roof Vent and Rain Gutter for Plants, Stable Green House for Flowers Outdoor for Winter,8 x 6 x 6.8 FT
  • Choose 4mm anti-UV polycarbonate board as the main material, which has thermal insulation effect and strong impact resistance, provides the plants with a safe environment for avoiding bad weather and the damage of small animals
Bestseller No. 2
Green House for Plants Outdoor, 6 x 8 x 7 FT Walk-in Polycarbonate Greenhouse Kit, Large Hot House Greenhouses w/Sliding Door and Ventilation Window for Winter (Slivery, 6 x 8 x 7 FT)
  • 【HEAVY-DUTY BASE & FRAME】Our hot house greenhouse is made of premium corrosion resistant and weather resistant powder-coated aluminum frame, it also reinforced the whole frame with diagonal bars to increase its stability. Provide solid support to your entire plant nursery, perfect for outdoor use.
Bestseller No. 3
AECOJOY 8'Lx6'Wx6.6'H Walk-in Garden Greenhouse, Polycarbonate Greenhouse with Adjustable Roof Vent, Rain Gutter and Sliding Door for Winter
  • 🍀Walk-in Spacious Greenhouse: The ideal growing environment is large enough for you to plant numbers of plants, flexibly arrange your plants and flowers inside. Protecting your plants from frost and excessive heat, the green house creates a greenhouse effect to achieve and the best results of planting. OVERALL DIMENSION IS 8'(L) x6'(W) x6.6'(H).
Bestseller No. 4
Aoxun Polycarbonate Walk-in Garden Greenhouse, Outdoor Stable Green House with Adjustable Roof Vent and Rain Gutter for Plants in Winter, 8 x 6 x 6.8 FT
  • Choose 4mm anti-UV polycarbonate board as the main material, which has thermal insulation effect and strong impact resistance, provides the plants with a safe environment for avoiding bad weather and the damage of small animals
Bestseller No. 5
MUPATER Polycarbonate Greenhouse for Outdoor, Walk-in Garden Green House Kit for Plants in Winter with Heavy Duty Aluminum Frame, Base, Sliding Door and Adjustable Roof Vent, 6' x 10' x 6', Silver
  • 【HEAVY-DUTY THICKENED ALUMINUM FRAME】The frame of our heavy-duty walk-in greenhouse kit is made of premium corrosion resistant and weather resistant powder-coated thickened aluminum, which is rust-resistant and more sturdy to deal with all kinds of weather. The internally tight closure triangular structure can effectively improve the stability of the outdoor greenhouse to prevent it from falling apart under the harsh environment.

Building a Monticello Greenhouse

Why we like polycarbonate greenhouses

Polycarbonate greenhouses are really trending nowadays. There are some really great resources for helping you make a decision online if you are thinking of purchasing them.

Polycarbonate is a highly rigid plastic which provides some of the best features of glass, but is tougher and impact resistant. The polycarbonate paneling that structures the greenhouses walls provides durable strength and supreme heat retention properties.

The inside of the greenhouses is more effectively insulated, which is obviously conducive to plant growth. Besides this heat retention and insulative property, the multi-wall polycarbonate paneling provides diffuse light that is designed to increase plant growth rates.

The Benefits Of polycarbonate greenhouse paneling

What are customers saying?

  • One user who purchased the MIC polycarbonate and aluminum greenhouse complained that high winds actually bent the structure so that he actually had to reinforce it with plywood.
  • Some of the cheaper greenhouses that are in high wind areas will need to be reinforced with plywood or PVC pipe, especially if they are kept out during the winter and not stored.
  • Another DIY fix for the polycarbonate hot houses is to do some silicone caulking. One reviewer even caulked all of the panels and panes inside of the greenhouse to ensure that the rain did not seep in, and heat did not escape.
  • Another important purchasing consideration is to determine whether your greenhouse comes with shelving or not.
  • Some users chose to place their greenhouses on wood decks where they could easily anchor them.
  • People who bought the Palram Nature Series Hybrid Hobby Greenhouse were pleasantly surprised at how durable it was even when confronting 50 mile-per-hour Oklahoma winds- even with an automatic vent opener.
  • Depending on the greenhouse you choose, sometimes the instructions are not great quality.
  • Most people who endeavor to operate their own greenhouse usually have some commonsense handicraft capabilities and can figure out how to assemble them without too much trouble. Though it is important to get another person to help you out when erecting them.
  • Another reviewer writes of their Paltam polycarbonate greenhouse that it is relatively sturdy and that it warms up quickly with the sunrise, but they do have to open their vent manually at night to help their greenhouse crops grow.
  • Some interesting features that can be included with these styles of green houses are rain gutters, roof vents, magnetic catching doors, aluminum reinforced frames, snow load kits, rust resistant coating as well as the protection of a strong shatter-resistant polymer.
  • People who purchased the Grandiose Elite polycarbonate greenhouse were happy that the packaging was intuitively designed to help the assembly process- there were five boxes that were numbered and each of the instruction steps corresponded so that it was pretty easy to understand how to linearly construct their greenhouse.

Summing Up

When choosing a greenhouse, users were pretty surprised at how cheap and long-lasting they have become- especially a cold frame greenhouse. There's so many more styles nowadays than there used today which means that any backyard hobbyist and horticulturalist can find a design that works for them in their own backyard.

One reason that people have begun returning to backyard garden cultivation with greenhouses is concerned over food security. As the cost of food has risen and the possibility of global calamities seemingly more probable day by day, having a greenhouse with seedlings, tomatoes, and all manner of other vegetables is a great way to protect you and your family and increase their food security.

As well, climate change concerns have made outdoor growing conditions more erratic which is an incentive to purchase a polycarbonate greenhouse and control the environment artificially. Some of the benefits of greenhouse gardening include extending the growing season; having access to fresh vegetables year-round; an ability to protect seed germination from inclement weather; protection of seedlings from insects, parasites and pests; protection of sprouts and seedlings from pesky birds.

Controlling the greenhouse environment can save money on plants as well as enabling you to grow plants in containers or in the ground directly.

If you are considering purchasing a polycarbonate greenhouse, Do some extensive reading prior to purchase and figure out which model is best for you. Important to remember that some greenhouses will require structural reinforcement as well as caulking to keep them in good standing for the long-term.


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