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Warm-weather entertaining means competing with mosquitoes, flies and ants for your own patio — and a handful of easy-to-grow plants can help push pests back without sprays or candles.
What Plants Help Repel Pests in Outdoor Spaces?
A short list of common herbs and flowers — including lavender, marigolds, basil, mint, citronella, rosemary, lemongrass, petunias, chrysanthemums and catnip — can help keep pests away from seating areas, doorways and dining spaces outdoors.
Each plant targets different bugs. Lavender works on mosquitoes and moths. Marigolds repel aphids, mosquitoes and flies. Basil discourages mosquitoes and houseflies. Mint helps with ants and mosquitoes. Rosemary deters mosquitoes and cabbage moths. Petunias work against aphids and tomato hornworms, while chrysanthemums repel multiple insects thanks to natural compounds in the flowers.
Citronella is the best known of the group. “Citronella is by far the most popular plant that repels mosquitoes,” garden expert Carmen Johnston told Real Simple. “It has a very pungent odor.I often place this in small eight-inch terra cotta pots and mix in with my centerpieces when entertaining outdoors. You can either use the clippings mixed in with arrangements or use the plant itself as the centerpiece.”
Lemongrass — sometimes called citronella grass — targets mosquitoes as well, while catnip has earned a reputation as a surprisingly strong mosquito repellent. Picking two or three plants that cover the pests you actually deal with is usually more effective than relying on a single variety.
Which Plants Repel Mosquitoes the Best?
For mosquitoes specifically, citronella, lemongrass, rosemary, lavender, basil, marigolds, mint and catnip are the standouts among easy-to-grow options.
Rosemary is a go-to for patios in warm regions. Annie Burdick and Jamie McIntosh write in The Spruce: “The scent of rosemary (Salvia rosmarinus) is a deterrent to mosquitos and other garden pests, such as cabbage moths. Rosemary loves warm and dry climates and may need to be moved indoors in areas with harsh, cold winters. But all summer long it adorns your patio and keeps pests at bay.”
Catnip is often overlooked but punches above its weight. Madeline Buiano writes in Martha Stewart: “Mosquitoes hate catnip (Nepeta cataria), the very same plant that your cats love. Also known as catmint, this herbaceous perennial emits a chemical that acts as a natural insect repellent.”
The takeaway: scent is doing most of the work. Plants that smell strong to humans — rosemary, mint, lavender, basil, citronella — tend to smell unbearable to mosquitoes, which is why placement matters as much as the plant itself.
How Do You Use Plants to Keep Pests Away Effectively?
To get real results, place pest-repelling plants near seating areas and doorways, use pots on patios for a stronger barrier effect, mix several varieties together and position fragrant plants where air flow can spread their scent.
A single basil pot tucked behind a grill will not do much. Clustering plants along the edges of a patio or dining table — and brushing or crushing leaves occasionally to release oils — gives the scent a chance to actually reach the bugs you are trying to repel. Carmen Johnston’s tip of working citronella into centerpieces is a useful template: bring the plant to where people are sitting.
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Layering plants matters too. Combining a mosquito-targeted plant like citronella or catnip with something that handles flies or aphids, like marigolds or basil, covers more of what shows up uninvited. Chrysanthemums add another layer because their natural compounds work against several insects at once.
Plants alone will not solve a pest problem. Pair them with the basics: empty standing water from buckets, planters and birdbaths, clean up yard debris where bugs breed and rest, and keep grass and shrubs trimmed back from seating areas. Done together, the right plants and the right habits make outdoor spaces noticeably less hospitable to pests.
