8x6 Greenhouse: 8x6 Greenhouses for sale, including aluminium 8 x 6 and wooden 8ft x 6ft greenhouses available to buy online from swgreenhouses.co.uk. An 8' x 6' greenhouse is the ideal size for growing all your plants and vegetables at home, with enough room inside the 8ftx6ft space for greenhouse staging, seed trays, and grow bags. We have a range of greenhouses in an 8x6 size that come with choices for the base, glazing (polycarbonate or toughened glass), and delivery/installation options. Shop our best 8x6 greenhouse offers below.