Ideal for tall plants or small trees - the 6′3″ height gives you plenty of room to grow. The steel base makes it sturdy enough to withstand strong winds, and a large 19″ x 30″ vent assembly is included to maintain plenty of air circulation for healthy plants. The lightweight greenhouse is portable, so you can set it right over your garden to get an early start planting seeds and an extended harvest in the fall. Freestanding and requires no special foundation or site preparation - just level the ground beneath it.