CULLEN, Mark. Canadian, b. 1956. Genres: Horticulture. Career: Weall & Cullen Nurseries Ltd., Markham, Ontario, president, 1990-. CFRB-Radio (Toronto), host of the weekly live garden show Anything Grows; Right in Your Own Backyard, TV series, host; Canada AM, weekly gardening segment, co-host; Sunday Sun, columnist. Publications: A Greener Thumb, 1990; The Real Dirt, 1992; The All Seasons Gardener, Getting More from Your Canadian Garden, 1995; The Complete Gardener. Address: Weall & Cullen Nurseries Ltd., 784 Sheppard Ave., E., Willowdale, ON, Canada M2K 1C3.