The 6 Best Cold Frames
If you want to ensure you maximize the productivity of your plant-growing endeavors, you can extend the growing season by protecting your plants from extreme cold (and, in some cases, heat) with one of these cold frames. Ideal for almost any small plants, they can comfortably fit in smaller gardens, on patios and even on balconies. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best cold frame on Amazon.
6. Outsunny 01-0468
With its open walk-in design, plastic coverings, and powder-coated steel frame, the Outsunny 01-0468 can be used as a portable fortress for your prized plants. Its main zipper door gives you easy access to your greens while maintaining the unit's internal climate.
- superior ventilation
- protection from extreme hot and cold
- needs a patch kit for repairs
|Rating||4.0 / 5.0|
5. Zenport SH3212A
Protect your plant stash with the Zenport SH3212A. Great for use in small places, like patios and balconies, the frame on this mini greenhouse is made from strong tubular steel with an attractive green finish that will blend in with your apartment or home decor.
- roll-up zippered panel
- forty-seven inches long
- the plastic is rather thin
|Rating||4.1 / 5.0|
4. Palram HG3300
Create a small, yet affordable, sanctuary for your plants with the Palram HG3300. All of its components are resistant to corrosion while its clear polycarbonate panels allow for the maximum level of light transmission, ensuring successful growth during the sunny months.
- double lids are removable
- 9 square feet of growing space
- not ideal for windy conditions
|Rating||4.4 / 5.0|
3. Gardener's Supply Cedar
The multifunctional Gardener's Supply Cedar unit is perfect for use on the ground for laying seeds, hardening off transplants, and growing during the cold seasons. Its narrow and compact design also makes it ideal for use in your driveway or walkway.
- base is rot-resistant
- top polycarbonate panels
- braces are adjustable
|Brand||Gardener's Supply Compa|
|Rating||4.8 / 5.0|
2. Lifetime 60053
The Lifetime 60053 is a raised garden bed kit constructed from high-density polyethylene, making it fully resistant to rotting, chipping, cracking, and peeling. It also provides for tool-free assembly, so you can be up and running in less than an hour.
- absorbs and retains warmth
- kit is stackable
- 5-year manufacturer warranty
|Rating||4.6 / 5.0|
1. Exaco Juwel BioStar 1500
Get a head start on your next growing season with the Exaco Juwel BioStar 1500. Its sturdy aluminum frame is weather-resistant, while each one of its 3 windows is equipped with 2 adjustable windproof ventilators to ensure proper plant propagation in almost any environment.
- no-drip coating stops condensation
- edges are rounded for safety
- 10-year guarantee against yellowing
|Brand||Exaco Trading Company|
|Rating||4.8 / 5.0|