Marigolds contain natural compounds, like pyrethrum, which is used in many commercial insect repellents. Marigolds help gardens by attracting pest-controlling insects and improving pollination. · the scientific verdict: · marigolds plants alone won’t keep mosquitoes away , as their scent isn’t concentrated enough. However, it’s the strategic use of marigolds and other pest-repellent plants that makes a difference. Do marigolds repel mosquitoes? However, the plant itself acting as a simple decorative barrier isn’t a magic force field. · as a natural mosquito repellent, marigolds are often touted for their pyrethrum content, which indeed can repel mosquitoes. Are rigold candles effective in repelling mosquitoes? Do marigolds keep mosquitoes away? Do marigolds need a lot of sun? · research from the university of florida found that water containing marigold root compounds showed up to 40% reduction in mosquito larval survival rates. We looked at the hard evidence behind marigold as a natural mosquito repellent to find out just how effective it is at keeping mosquitoes away. Where can i find marigold oil? Marigolds are effective plants for repelling mosquitoes and other pests, making them a popular choice for gardens and landscapes. · do marigolds keep mosquitoes away the short answer is yes , but with some important caveats. Scientific consensus suggests that simply placing a live, potted marigold plant nearby does not offer a robust or reliable barrier against mosquitoes.