Palram-Canopia Mythos 6x8 review

The Mythos is the small greenhouse we would recommend to most beginners: 49 sq ft under 4 mm twin-wall polycarbonate on every side, a galvanized steel base, gutters and a roof vent for $889 at Planet Greenhouse on November 12, 2026. It costs $10 less than its twin, the Hybrid, and insulates better. The catch is the narrow 22 in door and a single vent.

At 6 by 8 ft, the Mythos gives you 49 sq ft: a bench on each side and a path, or one bench and a few big pots. What sets it apart from cheaper 6x8 kits is the panels. All of them, roof and walls, are 4 mm twin-wall polycarbonate, the same as on the Essence. On a cold April night that air gap matters; seedlings sulk in a draughty box.

Light transmission is 82% per the dealer, diffused, so no scorched leaves. The trade-off is that you cannot really see your plants through the walls from the kitchen window. If that view matters to you, the Hybrid is the same frame with clear walls.

Every 6x8 kit is a squeeze, and the Mythos door is 22.2 in wide by 64.2 in high. Most adults duck a little to step in, and you will carry bags of compost rather than wheel them. Inside, the peak is 81.9 in, 6 ft 10 in, which is fine in the middle. The eave is 48.8 in, so the sides are bench height.

Planet Greenhouse lists 15.4 lb/ft² of snow and winds up to 56 mph "with the anchoring kit". For a 6x8 that is a sensible standard: better than the Outsunny 6x8's 8.19 lb/ft² and 27 mph, behind the steel tunnels. The galvanized steel base is included, and you will want to anchor it or fix it to a timber frame.

Planet Greenhouse had it at $889 on November 12, 2026, with free curbside freight to the 48 contiguous states, and the Hybrid at $899. Same frame, same base, same 5-year warranty. For $10 less you get better insulation. For most first greenhouses, that makes the Mythos the easy call.

$889 at Planet Greenhouse on November 12, 2026 (Planet Greenhouse product page (US dealer)).

Free curbside freight delivery to the 48 contiguous states (Planet Greenhouse). 5-year limited warranty (Palram-Canopia, per the dealer and canopia.com).

Palram-Canopia doesn't sell online in the US, so we link to Planet Greenhouse, a US dealer.

Head-to-heads: Palram Mythos 6x8 vs Palram Hybrid 6x8, Palram Mythos 6x8 vs Outsunny 6x8.

Rankings with this kit: best greenhouse kits, best polycarbonate greenhouse kits, best walk-in greenhouse kits, best greenhouse kits for winter and snow, best greenhouse kits under $2,000.