03/14/15 - 1:41pm
Greenhouses aren’t the only great cover-ups for gardeners determined to extend their growing seasons.
High tunnels, low tunnels and caterpillar tunnels work well, too. Also known as hoop houses or row covers, the tunnels consist of U-shaped metal or PVC (polyvinyl chloride) ribs draped by thin, plastic sheets.
They provide shade for sun-sensitive crops, protect tender plants from frost, help control insects and boost yields.
Why build hoop houses rather than more traditional greenhouses? Primarily because they don’t need artificial heat when seasonal temperatures drop.