Small Greenhouses

A small greenhouse, 4x6, 6x4 or 6x6 walk-in size, is the household working greenhouse, big enough for tomatoes and propagation but compact enough to fit a working garden without dominating. Aosom UK, Buy Sheds Direct and Cheaper-Online.co.uk between them cover £13-£1,239 across the range. Glazing material decides cost and longevity: horticultural glass (cheapest, breaks in hailstorms, lasts decades if it doesn't break), toughened safety glass (mid-tier, breaks into pebbles not shards), polycarbonate (lightest, lasts 15-20 years before UV haze). Frame is usually aluminium or galvanised steel; aluminium is lighter, doesn't need painting, and lasts 25+ years; steel is heavier and cheaper. Most small greenhouses sit on a metal base plate that needs concrete-paving foundations or a brick perimeter. Roof vents and side vents are essential, at least one of each per 6x4 footprint, more for 6x6. Auto-vents save losing seedlings on hot spring days.