Best mini greenhouses in the UK

What counts as a mini greenhouse?

The phrase covers low growhouses, tall wall cabinets, walkaround structures and very small lean-tos. They share a compact footprint but not the same working method. With a cabinet, you stand outside and reach in. With a compact walk-in, floor area is partly consumed by an aisle, but taller crops and direct access become easier. Decide which form matches your plants before comparing names.

The dimensions above are the published footprint or base figures for each model. Doors, lids, roof overhangs and your working position need extra room. Mark both the closed structure and the space you occupy while watering on the patio.

Best low growhouse: Forest Wooden Mini 4 × 2

At 1.20 × 0.62m, the Forest Mini occupies little depth. Two shelves, two front doors and independently opening lids make it especially useful for seed trays, herbs and small containers. The lower bay can accept a growbag-style arrangement, but the shelves and low roof constrain mature tall plants.

Use it when you want a fixed, tidy propagation place rather than a tiny substitute for a full greenhouse. Ensure the lids have clearance to open and can be secured in wind. It has no floor, so the supporting surface must be sound and level.

Best use of height: Forest Victorian 5 × 2

The Victorian's 1.47 × 0.72m base uses vertical space. Adjustable or folding shelves can change the configuration as plants grow; two roof vents, with one automatic opener on the listed version, help a small volume respond to rising temperature. It remains a cabinet, not a walk-in.

Choose it when wall height is available but patio depth is scarce. Check the clearance above opening vents, door swing and the route for reaching upper shelves. A tall slim structure also demands careful securing to its approved support.

Slim glass choices: Halls Wall Garden 24 and 26

The Wall Garden 24 has a 1.32 × 0.69m overall footprint, a sliding door and roof vent. The 26 extends the run to about 1.94m while keeping the same published 0.69m depth. Both list horticultural glass as standard and offer toughened glazing as an option. A base and staging are separate selections, so compare the complete configuration rather than only the standard kit.

These are good candidates when a narrow wall-side strip is available and you prefer a glass greenhouse appearance. The longer model gives more growing run but does not solve limited depth; shelves and pots still have to fit behind the door opening. For a busy family patio, consider whether upgrading the glazing is appropriate.

Flexible access: Forest Victorian Walkaround 3 × 4

The 0.90 × 1.20m base is compact, while four configurable doors allow access from several sides. Removable staging can free space for taller pots. That flexibility only works if the site provides clearance around the selected opening sides. Pressing it into a corner would sacrifice its main advantage.

This is a useful middle ground for gardeners who want to tend plants from outside yet need more reconfiguration than a fixed shelf cabinet offers.

Compact walk-in: Forest Wallscape 4 × 4

The Wallscape's 1.18 × 1.24m base gives a small standing area and an opening roof vent. The open-backed version is designed to meet a suitable wall or fence, which must be checked for fit and fixing requirements. It is much deeper than a 2ft-class cabinet, so it belongs in a different patio plan.

Choose this format if direct access to floor crops matters more than maximum shelf capacity per square metre. If the back cannot be left open against your proposed surface, compare an enclosed-back version in our wall greenhouse guide.

Before ordering: six measurements

Measure the base, roof overhang, door or lid sweep, available wall height, working space in front and safe route to the site. Then mark the mature height of the crops you want to grow. A mini greenhouse that fits the patio but cannot open or hold midsummer plants is the wrong size.

For a wider decision framework see our mini greenhouse buying guide and cold frame versus mini greenhouse comparison. If standing inside matters, compare the 6 × 4 greenhouse guide before settling on a cramped cabinet.

The RHS overview of greenhouse alternatives is useful when deciding whether protected shelves or a cold frame best suits the growing stage. For a Forest mini, the manufacturer's model information is the place to confirm supplied shelves and assembly instructions.