Expert Gardener Lawn Weed Control kills the weeds, not the lawn. This granular lawn weed control product kills dandelions, clovers and 250+ other major lawn weeds. Apply Expert Gardener Lawn Weed Control when broadleaf weeds are actively growing in Spring or Early Fall. Remember to always apply to a wet lawn and apply when no rain or water will be on the lawn for at least two days after application. After two days water in thoroughly, people and pets may enter the area when the lawn is fully dry after first watering. When you apply Expert Gardener Lawn Weed Control you can expect to see a greener lawn with weeds starting to wilt and die within 7 days after applying as directed.