BURBANK, Calif. -- Walt Disney Home Video here will launch a "Spring Video Promotion" on April 21 that targets Mother's Day, May 14, with a tie-in offer with wire service Superflora floral arrangements and gift baskets. Consumers buying an eligible video could save $14 on Superflora products. The promotion will run from April 18 through May 30. Titles in the promotion are "Heidi," "Anne of Green Gables" and "Tales From Avonlea, Volumes 1, 2, 3 and 4." Single cassettes will be priced at a suggested retail of $19.99, while the two-tape sets of "Anne of Green Gables" and "Anne of Avonlea" will be priced at $29.95. Merchandising materials include 28- and 37-unit mixed product prepacks. Prebook is March 7.