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Water the lawn thoroughly, apply fertilizer, and overseed if necessary to promote healthy growth.

Whether a one-time spray treatment to control mosquitoes is enough depends on multiple factors. Often, you’ll notice a big difference after one application. However, mosquitoes are likely to return if you don't reduce attractive standing water habitats. This usually takes four to eight weeks if it’s still prime mosquito season.

Technically, dandelions aren’t bad for your lawn, and they don’t directly kill grass. In fact, they appear in areas that are nutrient-deprived, and their long taproots can loosen the soil and bring nutrients closer to the surface. 

However, dandelions do spread quickly, and they can take over your lawn, eventually crowding out grass. This is why a healthy lawn is the best defense against dandelions.

Herbicides containing a combination of the active chemical ingredients dicamba, fluroxpyr, and quinclorac are most effective at purging your turf of white clover. However, for small home lawns, organic prevention and control can be very effective methods for killing clover weeds and save you from using harmful pesticides that might damage your lawn.