Beginner Gardening: Wall-O-Water "Cheap" alternative works well, 1 by JimKennard

JimKennard wrote:
We call these "Mini Greenhouses". They are just PVC pipes bent in the shape you see, then covered with 6-mil Greenhouse plastic (preferred - some use 4 mil).

By themselves they will keep plants quite warm in the day, and will protect against light frost.

To increase the frost protection significantly, just put one or two light bulbs (turned on, of course :) ) in, depending on the number of plants you're growing.

Many times people get 4-6 weeks head-start on the season this way, and they last forever.

By the way, when the days are warm, just flip the plastic off from one side, and to keep the plastic down, we cover the edges with dirt.

JIm Kennard