Best Greenhouses & Cold Frames — Polycarbonate + 5 Years (2026)
2 greenhouses & cold frames matching material “Polycarbonate” + warranty “5 Years”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Greenhouse UK (2026) guide.
#1 Pick
Palram Nature Series Hybrid Hobby Greenhouse, 6' x 4'Rated 4.5 out of 5 stars (264)
- Polycarbonate
- Small gardens
- 5 Years
£329.99
Pros
- Polycarbonate roof panels diffuse light evenly
- Clear side panels for maximum visibility
- Rust-resistant aluminium frame
Cons
- Assembly takes a full day for two people
#2 Pick
Palram-Canopia Nature Series Mythos Hobby GreenhouseRated 4.4 out of 5 stars (187)
- Polycarbonate
- Small gardens
- 5 Years
£379.99
Pros
- Robust aluminium frame with polycarbonate glazing
- Twin sliding doors for wide access
- Integrated gutters for rainwater collection
Cons
- Needs a level, prepared base before assembly