Ferti-lome Weed Out with Crabgrass Killer handles two lawn problems in one pass: it is a post-emergent spray that takes out crabgrass and other grassy invaders along with 200-plus broadleaf weeds, including dandelion, chickweed, ground ivy, poison ivy, and thistle, roots and all. The active ingredients are 2,4-D, quinclorac, and dicamba.

Spray when weeds are young and actively growing, following the label for your turf type and rates. It is rainproof about an hour after application, and adding a spreader-sticker helps the spray cling to waxy weed leaves. Avoid treating heat-stressed turf in the middle of a hot day.