If you "spring" into action, conquering dandelions – even late in the season – isn’t an impossible task. Dandelions are a broadleaf weed. Wait until after they sprout and have leaves, and then pounce on them with a postemergence herbicide. This weed killer is absorbed into the leaves and is circulated down into the root system. But try not to wait until summer. You get the best results in spring when the weeds are growing.
