Get a head start on spring with this affordable 4’ x 4’x 38” high greenhouse; constructed with snap-together powder-coated steel frame and PVC ventilated cover. Slot directly onto your raised garden bed. The zip-up windows provide easy access from both sides and permit air to flow through freely while the inner mesh keeps out unwanted pests. Easy to extend to 4’ x 8’ double sized greenhouse, simply extend the base and zip on another greenhouse kit – all the parts you need are included. Endlessly connect more greenhouse kits to extend to any length. Lift off in the summer heat and replace in fall to extend the season well into winter. Assembles with one person in 15 minutes.