But before I can relish the moment completely, the picture of a horde of little, white cabbage looper butterflies flits through my mind. Someday, I think, those seemingly harmless pollinators will leave little green worms to pester my vegetables. Needless to say, my anticipation soon turns into dread. No problem, some would say. Just bring out the insecticide and spray away.
Row covers are available in several forms at most garden centers and nurseries.
Each provides various forms of protection, but also has some limitations. For instance, solid film row covers made of polyethylene must be supported above the crop by wire hoops or a temporary framework, and anchored on the sides to prevent them from blowing off. They also must be monitored closely to prevent excessive heat buildup. Although heat buildup may be a problem in the early fall, it can be a distinct advantage in late fall and early winter gardens, extending the growing season well past average frost dates. Fabricated row covers also can be used in vegetable gardens.