Palram Canopia Harmony 6x4 Polycarbonate Greenhouse review
First-time growers wanting a low-maintenance, shatter-safe greenhouse for a small garden or patio.
By Tom Calder · Price last checked 20 Sep 2026, 12:29 BST · price-tracked
A sensible entry-level greenhouse: the polycarbonate panels are safer and warmer than glass, and the slide-in assembly is genuinely manageable for one or two people. Fine for seedlings and salad crops, provided you anchor it to a solid base.
as of 20 Sep 2026, 12:29 BST · Details
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- Shatter-resistant polycarbonate is safer than glass around children and pets, and diffuses light more evenly
- Rust-resistant aluminium frame on a galvanised steel base, backed by a 10-year panel guarantee
- Slide-in panel system makes self-assembly realistic without specialist tools
- The 0.7mm single-wall panels are thin, and can work loose or pop out in strong wind if not well secured
- Small footprint fills up quickly, and it lacks the clarity of a toughened-glass structure
Who shouldn't buy this
you are in an exposed or coastal spot and can't bolt it down to a firm base. The thin polycarbonate panels are prone to blowing out in gales, so a heavier toughened-glass or twin-wall greenhouse is the safer long-term buy.
Key specs
| Type | Polycarbonate greenhouse, aluminium frame |
| Size | 6ft x 4ft (1.85m x 1.26m footprint, 2.08m ridge) |
| Glazing | 0.7mm clear polycarbonate (90% light transmission) |
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