Small-Greenhouse Plans for Winter Growing

Forget simply stretching the season by a matter of weeks. Our innovative small-greenhouse plans take solar gain to the nth degree, with a design that’s optimized for winter growing. We’ll show you how to build a greenhouse that’s free-standing and features low-cost glazing and a simple foundation.

Colorado College Greenhouse
Banks of water-filled, black barrels absorb the sun's heat during the day and then release the stored energy at night inside Colorado College's solar greenhouse in Colorado Springs.
Photo courtesy