Mini greenhouse ~ Cut the bottom off a gallon milk jug and when a cold snap is in the forecast, place the jug over your plant, to keep warm in early Spring and Fall. Lots of other 25 No-Cost (or Low-Cost) Garden Tools. This is good idea
I should do this for the corners of my greenhouse. This instructable will cover the details of the Vertical Garden built for my Hydroponic, Automated, Networking, Climate Controlled Greenhouse Project.