A film (90) for covering a raised bed (10) in which two rows (12) of corn seeds (5) are sown comprises a longitudinally extending central portion (18) and a pair of longitudinally extending side portions (20) adjacent respective side edges (15) of the film (90). Intermediate portions (20) extend longitudinally between the central portion (18) and the side portions (19). First rows (24) of first openings (23) in the central portion (18) accommodate water into the raised bed (10). Second rows (28) of second openings (27) located in the side portions (20) accommodate soil encasing the side portions (20) for keying the side portions (20) in the soil. Third rows (31) of third openings (30) in the intermediate portions (21) are severable by a growing plant (85) to form slits (86) in the film (90) to accommodate the plants (85) through the film (90).
