outsunny mini greenhouse with mesh windows tunnel growing tent green 1This Outsunny 31. 5" x 78. 7" mini greenhouse is a compact and convenient design so whatever the space, you can grow your own vegetables and plants. The steel frame ensures a strong core, fitted with a reinforced plastic cover to protect against the elements. Three top windows and two side mesh windows allow air flow inside. Great for smaller outdoor spaces particularly city flats, where there's little outdoor space to use.