To protect your yard from mosquitoes, you can start by removing standing water sources such as buckets, flower pots, and bird baths where mosquitoes can breed. Keep your gutters clean and unclogged to prevent water from pooling. Trim tall grass and bushes, as mosquitoes like to rest in shady, damp areas. Plant mosquito-repelling plants such as citronella, lavender, and marigolds in your yard. Install screens on windows and doors to keep mosquitoes from entering your home.