Preen® 21-63902 Garden Weed Preventer Plus Plant Food, 5.625 Lb, Covers 900 SqFtStop weeds before they start. Preen Garden Weed Preventer Plus Plant Food works all season long! Unlike other weed killers and plant foods, one easy application prevents weeds up to 3 months and feeds your plants for beautiful color, foliage and strong roots to help avoid insects and disease. Can be used anytime during the spring, summer, or fall in flower and ornamental garden beds, around ground covers, trees, and shrubs. Although it will not kill