What is the best thing to put on the floor of a greenhouse?
Gravel over weed membrane is the most popular choice, used in around 60% of the greenhouses we install. Paving slabs suit growers who want a clean, firm surface for staging. Bare soil works best if you plant directly into borders. Concrete is permanent and easy to clean but traps cold in winter. Concrete is the strongest and most durable option, but paving slabs work well for most greenhouses under 10x8ft. Concrete is the best choice for permanent installations, large greenhouses, lean-to models attached to house walls, and sites with soft or unstable ground.