Roundups / Palram greenhouses

Grow-your-own · UK product comparison

Best Palram greenhouses compared in 2026

Palram-Canopia makes a big range of walk-in greenhouses, and this roundup compares five models side by side. Four have aluminium frames, from the shorter 6x4 footprints to the longer 6x8, so the main decision is how much floor space you want. The Eco Grow takes a different route with a green resin frame and thicker wall panels. Prices run from £289 to £879 in this dated snapshot, and each model is self-assembly. Use the dimensions, frame and glazing details to match the greenhouse to your plot.

P&P

Plot & Pot editors
We compare published product details, sizes and materials. These are desk-researched product roundups, not hands-on tests.

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Our stand-out pick

Palram-Canopia Mythos 6x6 Greenhouse, Silver

The Palram-Canopia Mythos 6x6 Silver sits in a useful middle ground. At £334 and 185 × 186 × 208 cm, it gives a squarer layout than the 6x4 models without the length of the 6x8. It has a hinged lockable door, roof vent, gutters and a galvanised steel base, alongside the aluminium frame and twin-wall polycarbonate glazing.

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At a glance

Our picks compared

Prices are dated snapshots and can change. Product dimensions are shown as width × depth × height.

Product	Brand	Price snapshot	Retailer	Dimensions	Weight	Frame	Glazing	Door	Ventilation	Extras	Assembly	Warranty	Roof glazing	Wall glazing
Palram-Canopia Mythos 6x4 Greenhouse, Silver	Palram-Canopia	£289.00	One Garden	185 × 126 × 208 cm	26.5 kg	Rust-resistant aluminium	Twin-wall polycarbonate	Hinged single door	1 opening window and 1 roof vent	Gutters and galvanised steel base	Self-assembly, 2 people, 4 to 6 hours	5-year defects and workmanship	—	—
Palram-Canopia Hybrid 6x4 Greenhouse, Green	Palram-Canopia	£354.00	One Garden	185 × 126 × 208 cm	27.4 kg	Powder-coated aluminium	Polycarbonate roof and wall panels	Hinged door	1 opening window	—	Self-assembly, 2 people, 4 to 6 hours	5-year defects and workmanship	—	—
Palram-Canopia Mythos 6x6 Greenhouse, Silver	Palram-Canopia	£334.00	One Garden	185 × 186 × 208 cm	34.1 kg	Rust-resistant aluminium	Twin-wall polycarbonate	Hinged lockable door	1 roof vent	Gutters and galvanised steel base	Self-assembly, 2 people, 4 to 6 hours	5-year defects and workmanship	—	—
Palram-Canopia Mythos 6x8 Greenhouse, Silver	Palram-Canopia	£319.00	One Garden	185 × 247 × 208 cm	39.1 kg	Rust-resistant aluminium	Twin-wall polycarbonate	Hinged door	1 opening window	—	Self-assembly, 2 people, 4 to 6 hours	5-year defects and workmanship	—	—
Palram-Canopia Eco Grow 6x6 Greenhouse	Palram-Canopia	£879.00	One Garden	204 × 201 × 198 cm	54.7 kg	Green resin	—	Hinged door	1 roof vent	—	No-tool self-assembly	7-year defects and workmanship	4 mm twin-wall polycarbonate	6 mm twin-wall polycarbonate

The details

Five Palram greenhouses, compared

01 · Best for smaller plots

Palram-Canopia Mythos 6x4 Greenhouse, Silver

The smallest and lowest-priced Mythos, with a roof vent, gutters and steel base.

The Mythos 6x4 Silver is the entry point to the range at £289, measuring 185 × 126 × 208 cm. It is the lightest model here at 26.5 kg. The aluminium frame and twin-wall polycarbonate glazing are the same as on the larger Mythos models, and the feature list includes a hinged single door, one opening window, a roof vent, gutters and a galvanised steel base. It is self-assembly with a 5-year defects and workmanship warranty. It suits gardeners wanting standing room on a modest footprint.

Price snapshot: £289.00 at One Garden, recorded 2026-11-02. Check the retailer page for the current price.

Key specifications

Dimensions: 185 × 126 × 208 cm
Weight: 26.5 kg
Frame: Rust-resistant aluminium
Glazing: Twin-wall polycarbonate
Door: Hinged single door
Ventilation: 1 opening window and 1 roof vent
Extras: Gutters and galvanised steel base
Assembly: Self-assembly, 2 people, 4 to 6 hours
Warranty: 5-year defects and workmanship

What stands out

Lightest in the roundup at 26.5 kg
Door, opening window, roof vent, gutters and galvanised steel base

Things to consider

At 126 cm long, it offers the least floor space of the Mythos range

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02 · Best for a coloured finish

Palram-Canopia Hybrid 6x4 Greenhouse, Green

The same 6x4 footprint as the Mythos, with a green powder-coated frame.

The Hybrid 6x4 Green matches the Mythos 6x4 on size at 185 × 126 × 208 cm, so what you are really choosing is the finish and glazing. It uses a powder-coated aluminium frame with polycarbonate roof and wall panels, and the green colour may blend into a planted garden better than bare silver. At 27.4 kg it is only slightly heavier than the silver version. You get a hinged door and one opening window, with the same 5-year defects and workmanship warranty. At £354 it suits buyers who prefer the colour.

Price snapshot: £354.00 at One Garden, recorded 2026-11-02. Check the retailer page for the current price.

Key specifications

Dimensions: 185 × 126 × 208 cm
Weight: 27.4 kg
Frame: Powder-coated aluminium
Glazing: Polycarbonate roof and wall panels
Door: Hinged door
Ventilation: 1 opening window
Assembly: Self-assembly, 2 people, 4 to 6 hours
Warranty: 5-year defects and workmanship

What stands out

Powder-coated green frame
Same compact footprint and 5-year warranty as the Mythos 6x4

Things to consider

At £354 it costs £65 more than the Mythos 6x4 with the same dimensions

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03 · Best overall

Palram-Canopia Mythos 6x6 Greenhouse, Silver

A squarer, roomier Mythos with a lockable door, roof vent, gutters and steel base.

The Mythos 6x6 Silver steps up from the 6x4 to 185 × 186 × 208 cm, giving a squarer layout with extra bench and growing room. The aluminium frame and twin-wall polycarbonate glazing match the rest of the Mythos range, while the hinged door is lockable and there is a roof vent, gutters and a galvanised steel base. At 34.1 kg it is heavier than the 6x4. It is self-assembly and carries a 5-year defects and workmanship warranty. At £334 it suits gardeners who want working room without needing the length of the 6x8.

Price snapshot: £334.00 at One Garden, recorded 2026-11-02. Check the retailer page for the current price.

Key specifications

Dimensions: 185 × 186 × 208 cm
Weight: 34.1 kg
Frame: Rust-resistant aluminium
Glazing: Twin-wall polycarbonate
Door: Hinged lockable door
Ventilation: 1 roof vent
Extras: Gutters and galvanised steel base
Assembly: Self-assembly, 2 people, 4 to 6 hours
Warranty: 5-year defects and workmanship

What stands out

Squarer 185 × 186 cm footprint than the 6x4
Lockable hinged door, roof vent, gutters and galvanised steel base

Things to consider

The listed ventilation is one roof vent

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04 · Best for maximum growing space

Palram-Canopia Mythos 6x8 Greenhouse, Silver

The longest Mythos, with the most floor length in the range.

The Mythos 6x8 Silver stretches to 185 × 247 × 208 cm, the longest model here. It shares the aluminium frame and twin-wall polycarbonate glazing of the other Mythos greenhouses, with a hinged door and one opening window. At 39.1 kg it is the heaviest of the aluminium models, so an extra pair of hands is sensible at assembly. It is self-assembly with a 5-year defects and workmanship warranty. At £319 it suits gardeners with a longer plot who want room for several growing rows or benches.

Price snapshot: £319.00 at One Garden, recorded 2026-11-02. Check the retailer page for the current price.

Key specifications

Dimensions: 185 × 247 × 208 cm
Weight: 39.1 kg
Frame: Rust-resistant aluminium
Glazing: Twin-wall polycarbonate
Door: Hinged door
Ventilation: 1 opening window
Assembly: Self-assembly, 2 people, 4 to 6 hours
Warranty: 5-year defects and workmanship

What stands out

247 cm length gives the most floor space among these aluminium models
5-year defects and workmanship warranty

Things to consider

Needs a longer plot, with one opening window listed

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05 · Best resin-frame alternative

Palram-Canopia Eco Grow 6x6 Greenhouse

A tool-free resin greenhouse with thicker wall panels and a longer warranty, at a higher price.

The Eco Grow 6x6 takes a different approach, using a green resin frame instead of aluminium. It is wider and deeper than the Mythos 6x6 at 204 × 201 cm, though slightly lower at 198 cm tall. The roof has 4 mm twin-wall polycarbonate panels and the walls use thicker 6 mm panels. It has a hinged door and one roof vent, and assembly is listed as no-tool. The warranty runs for 7 years. At £879 and 54.7 kg it is the heaviest and priciest option here, so it suits buyers who want the different frame and glazing setup.

Price snapshot: £879.00 at One Garden, recorded 2026-11-02. Check the retailer page for the current price.

Key specifications

Dimensions: 204 × 201 × 198 cm
Weight: 54.7 kg
Frame: Green resin
Roof glazing: 4 mm twin-wall polycarbonate
Wall glazing: 6 mm twin-wall polycarbonate
Door: Hinged door
Ventilation: 1 roof vent
Assembly: No-tool self-assembly
Warranty: 7-year defects and workmanship

What stands out

No-tool assembly and green resin frame
7-year defects and workmanship warranty

Things to consider

At £879 and 54.7 kg, it is much costlier and heavier than the Mythos 6x6

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