Mid-May through June is an excellent time for a second feeding of your lawn and usually when broadleaf weeds appear. TURF LINE’s Dissolve Weed Killer Plus NPK fortified fertilizer contains all essential plant nutrients and will control dandelions, plantain, chickweed, buckhorn and most other lawn weeds. For best results, apply when grass is tall and moist. In order for weeds to be affected, the material must adhere to the leaves of the weeds for 48 hours. Do not cut grass 48 hours prior to application OR 48 hours after application. Avoid application when raining or rain is in the forecast. Do not water for 48 hours after application. Use only on established lawns.