But perhaps the best part of lightweight garden greenhouses is the ability to pick it up and move it around your yard.  This allows you to maximize sun exposure during certain parts of the year.  Portability is a key feature in most of these kit models, and even the larger ones still can be moved by two people.  And the lightweight corrugated double-walled plastic panels help to insulate and distribute warm, even sunlight throughout the structure.  You should really consider keeping your plants healthy throughout the year with a portable garden greenhouse.