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Palram Double 21" H x 3'5" W x 3'5" D Polycarbonate 0.8 mm Cold Frame Greenhouse

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Palram Double 21" H x 3'5" W x 3'5" D Polycarbonate 0.8 mm Cold Frame Greenhouse

The Double Cold Frame is perfect for starting seeds and protecting fragile sprouts from cool nights. You can remove the lids for easy access to your plants. You'll enjoy greenhouse benefits on a backyard scale with this affordable cold frame.


  • Frame material: Aluminum
  • Panel material: Polycarbonate
  • Get an early start on seeding
  • Extends the season for herb and vegetable gardens
  • All components are corrosion resistant
  • Adjustable roof doors provide ventilation and easy access
  • Adjustable, ultra-clear covers provide excellent ventilation
  • Allow maximum light transmission
  • Crystal-clear polycarbonate SnapGlas panels are nearly indestructible
  • Compact size fits almost anywhere but still provides over 9 square feet of growing space
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  • Overall: 1.833' H x 3.417' W x 3.417' D
  • Overall Product Weight: 12lbs

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Palram Double 21" H x 3'5" W x 3'5" D Polycarbonate 0.8 mm Cold Frame Greenhouse

Weights & Dimensions

  • Overall: 1.833' H x 3.417' W x 3.417' D
  • Interior Space: 3.333' W x 3.333' D
  • Panel Thickness: 0.8mm
  • Overall Product Weight: 12lbs


Product Type: Cold FrameFrame Finish: 1: Black
Frame Finish: 2: SilverFrame Material: Aluminum
Panel Material: Plastic
  • Panel Material Details: Polycarbonate
UV Resistant: Yes
Warp Resistant: YesCrack Resistant: Yes
Rot Resistant: YesRust or Corrosion Resistant: Yes
Foundation Included: NoFoundation Needed: No
Portable: YesInstallation Hardware Included: No
Footprint Shape: SquareGutters: No
Ventilation: Yes
  • Ventilation Location: Roof Vent
  • Number of Vents: 2
  • Adjustable Vents: Yes
Roof Finish: Clear
Roof Windows: Yes
  • Number of Roof Windows: 2
Doors Included: No
Shelves Included: NoHooks or Hangers Included: No
Planter Included: NoFloor Included: No
Bench Included: NoMisting System Included: No
Country of Manufacture: Israel 


Assembly Required: Yes 

About the Manufacturer

With nearly 50 years of experience, Palram is one of the world’s largest and most advanced manufacturers of polycarbonate, PVC, Acrylic, and other thermoplastic sheets for a variety of industries including construction, graphics and display, architecture, and for the do-it-yourself market (DIY). The company has manufacturing facilities in Israel, USA, England, Germany, China, and Russia.

Palram Double 21" H x 3'5" W x 3'5" D Polycarbonate 0.8 mm Cold Frame Greenhouse

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When you buy a Palram Double 21" H x 3'5" W x 3'5" D Polycarbonate 0.8 mm Cold Frame Greenhouse online from Wayfair, we make it as easy as possible for you to find out when your product will be delivered. You can check on a delivery estimate for the Palram Part #: HG3300 here. If you have any questions about your purchase or any other Greenhouses product for sale our customer service representatives are available to help.Whether you just want to buy a Palram Double 21" H x 3'5" W x 3'5" D Polycarbonate 0.8 mm Cold Frame Greenhouse or shop for your entire home, Wayfair has a zillion things home.
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Customer Reviews

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Tell us what you think about the Double 21" H x 3'5" W x 3'5" D Polycarbonate 0.8 mm Cold Frame Greenhouse. It will help us provide you with better products in the future and help your fellow Wayfair shoppers make better purchases.

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Average Overall Rating:
(based on 11 reviews)

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winter planting made possible

Carina from Temecula, CA– Verified Buyer

I did not give this 5 stars because it was a bit tricky to put together and when I'm using it the tops tend to fall off and it's not all that easy to put them back on.
However, it's doing its job and I have plants growing underneath it.

Was this helpful? Yes2 No0

Lightweight, gets the job done

Lauren from Bowie, MD– Verified Buyer

This is not the sturdiest coldframe, but it is sufficient for limited backyard garden use. Instructions for assembly are adequate, and it was not too difficult to put together.

Was this helpful? Yes2 No0

Double Polycarbonate Cold Frame Greenhouse

Sandra from Warren, MI– Verified Buyer

I received my greenhouse and it was very easy to assemble. I installed it on a flat wood surface about waist high, lined it with landscape fabric (double thickness) to hold the soil and plants. It is a joy to use. It is sturdy enough to withstand wind and thunderstorms in my area of Michigan. I would recommend it to anyone that loves gardening.

Was this helpful? Yes4 No0

Great for portability!

Donna from Cadillac, MI

Great little green house. Took me awhile to put it together but it worked great.

Was this helpful? Yes0 No0

Sizing larger than 3x3 expected

Nancy from Columbia, PA– Verified Buyer

Much larger outside measurement than expected. Could be a problem for an older shorter person such as myself. May not be able to make use of the taller middle.

Was this helpful? Yes2 No0

Wayfair is the first email I open

Marsha from Crestview, FL– Verified Buyer

Just as pictured. Very sturdy. I searched lots of different sites and styles and I'm so pleased I settled on this one. Wayfair had lots more to choose from as opposed to other sites.

Was this helpful? Yes1 No1

poly-tex cold frame

Jennifer from Avon, CT– Verified Buyer

Product came quickly and packaged nicely. Haven't had a chance to use it yet due to the weather but it looks hardy and I can't wait!

Was this helpful? Yes2 No1

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OUR SKU # PY1057