How Do MarigoldsKeepBugsAway? Research indicates that marigold plant roots produce toxic chemicals that kill root knot nematodes, as well as other harmful nematodes that feed on plant roots. When it comes to usingmarigolds for pest control... What do marigolds repel? Marigolds are one of the best pest-repellent plants you can put in a backyard. They emit a strong aroma and it is that pungent scent that is responsible for deterring insects and bugs. What Pests do MarigoldsKeepAway? One of the amazing benefits of planting marigolds within your garden is that there's an array of pests that will be deterred from the area.Here's how to usemarigoldstokeepbugsaway from your garden and other plants 9. Marigolds. The marigold is one of the most well-known insect-repelling plants and with good reason — they have a scent that will keep pests like mosquitoes, nematodes like cabbage worms, and other pests away. Marigold Pest Control. Although all Marigolds are repellent to these unsuitable garden resident to some extent , the most barbed and effective seems to be Gallic Marigolds . Has anyone here usedmarigoldsto deter bugs? I’ve germinated about 50 marigolds with my girls so they can all grow together(separate pots for the marigolds) are the marigolds worth the extra work? Learn how to protect your garden from pests using this simple bug mesh hack! Perfect for raised beds and organic gardening.Did you know marigolds are natural pest repellents? They help keep unwanted bugsaway while adding a pop of color to the garden. Most marigolds have a strong scent that serve to turn bugsaway. Even humans may find too much marigold sniffing unpleasant. Organic gardeners use the flower around their plants to repel aphids, but also keep mosquitoes at bay. Marigolds do not typically keep chipmunks away from the garden.Tokeep pill bugsaway from your garden, you can try reducing moisture levels, removing debris and clutter where they can hide, and using barriers like diatomaceous earth or copper tape. 12 Mosquito Repellent Plants. What are the best plants tokeep mosquitoes away? Plant these 12 plants in your garden for their colorful and fragrant display, plus their ability tokeep uninvited bugs out. By Christine Yoo Updated .