LawnPro Step 1 (28-0-7) Crabgrass Preventer Plus Lawn Food should be applied in early spring. Prevents crabgrass, foxtail, oxalis, spurge and other grassy weeds all season long. Feeds and greens - fast green-up after winter. Do not apply when seeding. Not for use on dichondra grass or bentgrass lawns. Active ingredient: 1.29% Pendimethalin.