Row cover

In agriculture, row cover is any material used as a protective covering to shield plants, usually vegetables, primarily from the undesirable effects of cold and wind, and also from insect damage. Commercially available row cover is usually a lightweight synthetic, such as clear plastic (polyethylene) or spunbonded polyester. It is placed directly above rows of crops on a supporting framework—often, on wire hoops to from a low tunnel—and usually left in place for several weeks until crops are well-established. Floating row cover is an extremely light version that can be placed directly over plants, without need for support.