Plot & Pot

Roundups / 6x4 greenhouses

Grow-your-own · UK product comparison

Best 6x4 greenhouses compared in 2026

A 6x4 greenhouse is a popular size for a small garden, and the five here range from £289.00 to £809.99. Two are lightweight aluminium models from Palram-Canopia, and three are timber greenhouses from Mercia and Waltons. The glazing varies too, with twin-wall polycarbonate, polycarbonate panels and styrene all in the mix. This roundup is based on desk research of the product details supplied, not hands-on testing.

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 6x4 Greenhouse, Silver

The Palram-Canopia Mythos 6x4 Greenhouse, Silver is our pick on paper. It is the cheapest here at £289.00, yet it comes with twin-wall polycarbonate glazing, a hinged single door, one opening window, a roof vent, gutters and a galvanised steel base. Its rust-resistant aluminium frame weighs 26.5 kg, and it has a 5-year defects and workmanship warranty. No other greenhouse in this group lists as many extras at a lower price. This choice comes from comparing the supplied details, not from testing.

View One Garden

At a glance

Our picks compared

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

ProductBrandPrice snapshotRetailerDimensionsWeightFrameGlazingDoorVentilationExtrasAssemblyWarrantyFloorRoof styleSize
Palram-Canopia Mythos 6x4 Greenhouse, SilverPalram-Canopia£289.00One Garden185 × 126 × 208 cm26.5 kgRust-resistant aluminiumTwin-wall polycarbonateHinged single door1 opening window and 1 roof ventGutters and galvanised steel baseSelf-assembly, 2 people, 4 to 6 hours5-year defects and workmanship———
Palram-Canopia Hybrid 6x4 Greenhouse, GreenPalram-Canopia£354.00One Garden185 × 126 × 208 cm27.4 kgPowder-coated aluminiumPolycarbonate roof and wall panelsHinged door1 opening window—Self-assembly, 2 people, 4 to 6 hours5-year defects and workmanship———
Mercia Traditional Greenhouse 4x6Mercia£479.99One Garden192.8 × 124.1 × 206 cm94 kgDip-treated shiplap timberStyreneHinged single door1 window—Self-assemblyConditional 10-year anti-rot, annual retreatment requiredNot supplied——
Evesham Wooden Greenhouse 6 x 4Waltons£559.99WaltonsApprox. 183 × 122 cm nominal footprint (6 × 4 ft) cm—TimberUV-resistant shatterproof styrene—Opening roof vent———Not suppliedApex6 × 4 ft variant
Woodsman Apex Wooden Greenhouse 6 x 4 PolycarbonateWaltons£809.99WaltonsApprox. 183 × 122 cm nominal footprint (6 × 4 ft) cm—TimberPolycarbonateConfigurable positionOpening roof vent————Apex6 × 4 ft variant

The details

Five 6x4 greenhouses compared

Product photo of Palram-Canopia Mythos 6x4 Greenhouse, Silver

01 · Best Overall

Palram-Canopia Mythos 6x4 Greenhouse, Silver

A well-equipped aluminium greenhouse with a roof vent, gutters and a steel base for just £289.00.

The Palram-Canopia Mythos 6x4 Greenhouse, Silver packs a lot into the lowest price here. It stands 208 cm tall with a 185 x 126 cm footprint, and the rust-resistant aluminium frame weighs 26.5 kg. Twin-wall polycarbonate glazing covers the structure, and there is a hinged single door, one opening window and a roof vent, which gives two ways to let air in. Gutters and a galvanised steel base are included. It is self-assembly, listed as a job for two people taking around 4 to 6 hours, and a 5-year defects and workmanship warranty applies.

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

  • Roof vent and opening window give two ventilation points
  • Gutters and a galvanised steel base are included for £289.00

Things to consider

  • Self-assembly is a 4 to 6 hour job for two people
  • Warranty is 5 years, shorter than the 10-year anti-rot cover on the timber models
View One Garden
Product photo of Palram-Canopia Hybrid 6x4 Greenhouse, Green

02 · Best Aluminium Greenhouse in Green

Palram-Canopia Hybrid 6x4 Greenhouse, Green

A powder-coated green aluminium greenhouse with polycarbonate panels and an opening window, at £354.00.

The Palram-Canopia Hybrid 6x4 Greenhouse, Green shares its 185 x 126 x 208 cm size with the Mythos, but it has a different look. The powder-coated aluminium frame comes in green, and the roof and walls use polycarbonate panels. It has a hinged door and one opening window, and it weighs 27.4 kg. Assembly is by self-build, listed as taking two people around 4 to 6 hours. The same 5-year defects and workmanship warranty applies. Next to the Mythos it costs £65 more, and its listed features are a door and a window, with no roof vent, gutters or steel base named.

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 aluminium frame for a coloured finish
  • Polycarbonate roof and wall panels with a hinged door

Things to consider

  • £354.00 is £65 more than the Mythos, which adds a roof vent, gutters and a steel base
  • Only one opening window for ventilation
View One Garden
Product photo of Mercia Traditional Greenhouse 4x6

03 · Best Traditional Timber Look Under £500

Mercia Traditional Greenhouse 4x6

A shiplap timber greenhouse with a hinged door and window, but its anti-rot cover depends on yearly retreatment.

The Mercia Traditional Greenhouse 4x6 is a classic timber build at £479.99. The frame is dip-treated shiplap timber, and it measures 192.8 x 124.1 x 206 cm. At 94 kg it is far heavier than the aluminium models. Glazing is styrene, and there is a hinged single door and one window. No floor is supplied, so you would need to plan for what goes underneath. It is self-assembly. The 10-year anti-rot warranty is conditional, as annual retreatment is required.

Price snapshot: £479.99 at One Garden, recorded 2026-11-02. Check the retailer page for the current price.

Key specifications

Dimensions
192.8 × 124.1 × 206 cm
Weight
94 kg
Frame
Dip-treated shiplap timber
Glazing
Styrene
Door
Hinged single door
Ventilation
1 window
Floor
Not supplied
Assembly
Self-assembly
Warranty
Conditional 10-year anti-rot, annual retreatment required

What stands out

  • Dip-treated shiplap timber frame gives a traditional look
  • Hinged single door and a window come as standard

Things to consider

  • The 10-year anti-rot warranty is conditional on annual retreatment
  • No floor is supplied
View One Garden
Product photo of Evesham Wooden Greenhouse 6 x 4

04 · Best UK-Made Timber Option

Evesham Wooden Greenhouse 6 x 4

A traditional shiplap apex greenhouse with a roof vent and a 10-year anti-rot guarantee, for £559.99.

The Evesham Wooden Greenhouse 6 x 4 is a timber greenhouse with an apex roof and an opening roof vent. Glazing is UV-resistant shatterproof styrene. The retailer describes UK-made PEFC timber construction and backs it with a 10-year anti-rot guarantee. It has a floorless drainage design, with no floor supplied. It is self-assembly. At £559.99 it costs more than the Mercia, and it sits well above the two aluminium models, so it suits those who prefer a timber greenhouse with a UK-made build.

Price snapshot: £559.99 at Waltons, recorded 2026-11-03. Check the retailer page for the current price.

Key specifications

Frame
Timber
Glazing
UV-resistant shatterproof styrene
Roof style
Apex
Ventilation
Opening roof vent
Floor
Not supplied
Size
6 × 4 ft variant
Dimensions
Approx. 183 × 122 cm nominal footprint (6 × 4 ft) cm

What stands out

  • UK-made PEFC timber construction with a 10-year anti-rot guarantee
  • Opening roof vent and UV-resistant shatterproof styrene glazing

Things to consider

  • No floor is supplied
  • At £559.99 it costs nearly double the Palram Mythos
View Waltons
Product photo of Woodsman Apex Wooden Greenhouse 6 x 4 Polycarbonate

05 · Best Premium Timber with Polycarbonate

Woodsman Apex Wooden Greenhouse 6 x 4 Polycarbonate

A premium timber apex greenhouse with polycarbonate glazing and a door you can position to suit, for £809.99.

The Woodsman Apex Wooden Greenhouse 6 x 4 Polycarbonate is the priciest greenhouse here at £809.99. It is a timber build with shiplap cladding, an apex roof and an opening roof vent. Glazing is polycarbonate, which sets it apart from the styrene-glazed timber models. Its standout feature is configurable door placement, so you can choose where the door goes to suit your garden layout. It is self-assembly and carries a 10-year anti-rot guarantee. The price is the main hurdle, as it costs £250 more than the Evesham.

Price snapshot: £809.99 at Waltons, recorded 2026-11-03. Check the retailer page for the current price.

Key specifications

Frame
Timber
Glazing
Polycarbonate
Roof style
Apex
Ventilation
Opening roof vent
Door
Configurable position
Size
6 × 4 ft variant
Dimensions
Approx. 183 × 122 cm nominal footprint (6 × 4 ft) cm

What stands out

  • Configurable door position to suit your garden layout
  • Polycarbonate glazing with an opening roof vent on a shiplap timber frame

Things to consider

  • Priciest of the five at £809.99, £250 more than the Evesham
View Waltons