QuestionsHow to growLawnsWeedsDandelions 0 Vote Up Vote Down Christine Healy asked 15 years ago I have never seen so many Dandelions in my garden what is the best way to control them, I have a very large area to cover. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago If you have weeds in the lawn, use a lawn weedkiller in fine weather when the soil is moist. Dandelions in flower beds can be treated with Roundup but do not get it on plants.