Row cover

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In horticulture, 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 form a low tunnel—and usually left in place for several weeks until crops are well-established.

A protective tunnel formed with row cover is sometimes called a cloche. More often, a cloche, or bell jar, refers to a covering made of glass or plastic, placed over individual plants to provide similar protection as row cover.

Floating row cover is extremely lightweight row cover fabric that can be placed directly over plants, without need for a supporting framework, instead being simply anchored to the ground against wind.