posted 10 years ago
Just about anything can be used to cover plants from a light frost…..fabric, plastic, paper, mulch, etc. Usually such light frosts come on still nights without wind anyway. Another way is to run a sprinkler all night on the plants….this will form ice and as long as ice is in the process of forming, the temperature under and around the ice won't go much below 32 F. A windy hard freeze is another matter. You need to anchor the covers somehow. Plastic jugs with the bottoms cut out, sunk into the ground over small plants, can work, or hoops over beds with plastic or fabric laid over and weighted down on all sides. I've achieved good protection to quite low temps…..low 20's at least, by combining these techniques….sprinkling on covered plants. If the covers are fabric, ice will harden the fabric into a solid, warm "igloo" which can resist any wind.