The best greenhouses under £300
Under £300 you get walk-in greenhouses with 4 mm polycarbonate, small polytunnels and growhouses. Budget for a base as well, because light frames need anchoring against the wind.

1
£169
Outsunny · Lean-to greenhouse · 4x6 ft
Outsunny 6 x 4ft Lean-to Wall Polycarbonate Greenhouse
Budget polycarbonate lean-to with a sliding door
Score 5.0 / 10

2
£152
Outsunny · Polytunnel · 9.8x19.5 ft
Outsunny Polytunnel Greenhouse 6 x 3 x 2 m
A big 6 x 3 m tunnel for very little money
Score 5.0 / 10

3
£60
VOUNOT · Polytunnel · 6.6x9.8 ft
VOUNOT Polytunnel Greenhouse 3 x 2 x 2 m
The most-reviewed budget tunnel on Amazon UK
Score 5.0 / 10
HA
4
£246
Halls · Lean-to greenhouse · 2x6 ft
Halls Wall Garden 2x6
A slim glass lean-to for a sunny wall
Score 5.0 / 10

5
£250
Outsunny · Greenhouse · 6x8 ft
Outsunny 6 x 8ft Polycarbonate Greenhouse with Sliding Door
The cheapest 6x8 polycarbonate greenhouse
Score 3.8 / 10