Several aromatic plants produce volatile compounds that bees find unpleasant, and planting them in specific areas can reduce bee traffic, though no single flower or herb creates a reliable bee-free zone. Citronella grass, various mints, pennyroyal, and wormwood are among the most frequently cited options, and some of these do have research behind them. But the gap between what a plant’s essential oil does in a laboratory test and what the living plant does in your garden is wider than most gardening advice acknowledges, and understanding that gap is the difference between a strategy that helps and one that wastes your time.
Citronella Grass and Lemongrass
Citronella is best known as a mosquito repellent, but the oil it produces also repels bees. A study on giant honeybees found that citronella oil triggered strong antennal responses in worker bees and produced complete repellency in behavioral choice tests, where bees were given the option of moving toward citronella-treated areas or untreated ones. When researchers applied citronella directly to the surface of honeycomb in the field, bees gradually abandoned the treated comb.1Applied Biological Research. REPELLENT ACTIVITY OF CITRONELLA AND CLOVE OILS AGAINST WORKERS OF THE GIANT HONEYBEE, Apis dorsata (HYMENOPTERA: APIDAE) Clove oil performed well too, though at a lower rate of about 80% repellency compared to citronella’s 100% in the same tests.
The catch is that a living citronella plant sitting in a pot releases far less volatile oil into the air than concentrated oil applied to a surface. If you crush the leaves or brush against them, the scent intensifies, but the passive scent cloud from an undisturbed plant is modest. Citronella grass (Cymbopogon nardus) and lemongrass (Cymbopogon citratus) are closely related and share many of the same aromatic compounds. Planting them densely along a patio border or near an outdoor dining area can help, but expecting them to clear bees from a wide radius is unrealistic.
Mint, Peppermint, and Spearmint
Mint-family plants are some of the most commonly recommended bee deterrents in gardening circles, and their essential oils do show measurable effects on bee physiology. Peppermint oil has been tested against honeybees in the context of controlling varroa mites inside hives, where it caused mortality in mites at certain concentrations.2Open Veterinary Journal. Some essential oils as potential control agents for varroa mite (Varroa destructor) in infected honey bees (Apis mellifera) The important detail there is that the bees were enclosed with the oil; they could not simply fly away. In an open garden, bees encountering the scent of a mint plant can and do just avoid it, which is exactly the outcome you want if you are planting mint to discourage visits.
Mint is also one of the easiest plants to grow, sometimes aggressively so. It spreads by runners and can take over a garden bed if you let it. Planting peppermint or spearmint in containers near doors, windows, or eating areas is a practical approach that gives you the aromatic benefit without the invasiveness. One thing to keep in mind: when mint flowers, the small blooms actually attract bees. If your goal is deterrence, pinch off flower buds before they open.
Pennyroyal and Wormwood
Pennyroyal (Mentha pulegium) belongs to the mint family but deserves separate attention because it contains pulegone, a compound with documented anti-feeding and pesticide properties.3PubMed Central. Pulegone: An Emerging Oxygenated Cyclic Monoterpene Ketone Scaffold Delineating Synthesis, Chemical Reactivity, and Biological potential Pennyroyal has a long folk history as an insect repellent and was used in medieval times to ward off fleas and other pests. Its scent is sharp and medicinal, distinctly stronger than garden-variety spearmint. As a bee deterrent, pennyroyal’s advantage is the potency of its volatile emissions even from the living plant.
Wormwood (Artemisia absinthium) takes a different chemical approach. Its bitter, herbaceous scent comes from compounds like absinthin and thujone, both of which are broadly repellent to insects. Wormwood is a hardy perennial that tolerates poor soil and drought, making it a low-maintenance border plant. It is also quite handsome, with silvery-green foliage that works well in ornamental beds. Neither pennyroyal nor wormwood will create an impenetrable barrier against bees, but planted thickly, they contribute to an aromatic landscape that most foraging bees prefer to bypass in favor of more inviting targets nearby.
A word of caution: pennyroyal is toxic to humans and pets when ingested, and its concentrated oil is dangerous even in small amounts. If you have small children or animals that chew on garden plants, this is not the right choice.
Marigolds Are More Complicated Than You Have Heard
Marigolds appear on nearly every “plants that repel bees” list online, but the reality is more nuanced. Marigolds do produce bioactive compounds, including thiophene and alpha-terthienyl, which effectively repel certain pests like aphids, whiteflies, and root-knot nematodes.4Sustainability Science and Resources. Marigolds As a Companion Crop: Impact on Pest Control and Pollinator Attraction in Mixed Cropping Systems These compounds are the reason marigolds are widely used as companion plants in vegetable gardens. However, repelling aphids and repelling bees are not the same thing.
Many marigold varieties are actually quite attractive to bees and other pollinators. French marigolds (Tagetes patula) and Mexican marigolds (Tagetes erecta) produce open flowers with accessible pollen and nectar. Some gardeners report that bees seem less interested in marigolds than in other flowers, and this may have more to do with the relatively low nectar reward than with any active repellent effect. In practice, if you fill a bed with marigolds near an area where you want fewer bees, you might see somewhat fewer visitors than you would with, say, lavender or sunflowers, but you are not planting a bee deterrent. You are planting a flower that bees find a bit boring compared to richer alternatives.
The Lab-to-Garden Gap
This is where the popular advice gets most misleading. Much of the evidence supporting specific plants as bee repellents comes from studies using concentrated essential oils, not living plants growing in soil. When researchers test an essential oil against bees in a controlled environment, they are typically applying doses far higher than what a garden plant passively releases. The results can be dramatic in the lab and irrelevant in the backyard.
A telling example comes from research on neem-based insecticides and honeybees. In feeding-dish bioassays, foraging honeybees could detect and avoided sugar syrup containing neem seed extract at concentrations as low as 0.1 parts per million of azadirachtin. That is an impressive level of sensitivity. But when researchers moved to field conditions and applied neem to flowering canola plots, there were no significant differences in the numbers of foraging bees collected in treated versus untreated areas.5The Canadian Entomologist. EVALUATION OF THE REPELLENT EFFECTS OF A NEEM INSECTICIDE ON FORAGING HONEY BEES AND OTHER POLLINATORS The researchers themselves concluded that feeding-dish bioassays, while demonstrating that bees can detect compounds, may not predict what happens in real growing conditions.
This matters because many of the confident claims you see on gardening websites are extrapolated from essential oil studies. “Eucalyptus repels bees” becomes “plant eucalyptus near your patio,” even though the research tested concentrated eucalyptol on insects in sealed chambers. Living eucalyptus trees, in fact, are heavily visited by bees in the regions where they grow. The lesson is that a plant whose essential oil repels bees in a petri dish may not repel bees from your yard, and a plant that bees largely ignore is not the same as a plant that pushes bees away.
How Nectar Chemistry Influences Bee Visits
Some plants produce nectar containing secondary metabolites, meaning chemical compounds that are not part of the plant’s basic metabolism but serve defensive roles. These compounds can be toxic or repellent to flower visitors, though the relationship is surprisingly complex. Caffeine, for example, occurs naturally in the nectar of coffee and citrus plants. At low concentrations, it actually improves honeybee memory for odors associated with food rewards, which enhances pollen transfer. But at higher concentrations, the same compound becomes repellent.6Functional Ecology. Plant secondary metabolites in nectar: impacts on pollinators and ecological functions
This concentration-dependent flip is common across many plant compounds. A substance that attracts pollinators at one dose repels them at another. Plants have evolved this system as a kind of quality control for their pollination services. Some nectar compounds may even help protect bees against parasites. Research on bumblebees found that secondary metabolites in floral nectar reduced parasite infections, suggesting that bees might sometimes benefit from consuming mildly “toxic” nectar.7PubMed Central. Secondary metabolites in floral nectar reduce parasite infections in bumblebees
For your purposes as a gardener, this means that a plant’s reputation as a “bee repellent” sometimes reflects nothing more than bees finding its nectar unrewarding or mildly unpleasant at the concentrations that particular species produces. Red-flowered varieties of certain plants, pitcher plants, and tubular flowers that are adapted for hummingbird or butterfly pollination tend to get fewer bee visits not because they repel bees chemically, but because their flower shape makes it physically difficult for bees to feed. The effect is the same from your perspective, but the mechanism is entirely different.
Botanical Compounds That Actually Harm Bees
There is an important distinction between plants that bees find unappealing and botanical compounds that can injure or kill them. If you are looking to reduce bee visits near a seating area, you want the former. Some plant-derived substances fall squarely into the latter category, and knowing the difference matters if you care about not harming the bees in your area, which you should.
Azadirachtin, the active ingredient in neem-based products, is one of the most studied botanical insecticides in relation to bees. It has been shown to cause lethal effects in several bee species, along with a wide range of sublethal effects that impair development and behavior.8PubMed Central. Are Botanical Biopesticides Safe for Bees (Hymenoptera, Apoidea)? Research has also found that honeybee larvae fed diets containing residues of common botanical insecticides, including neem oil, andiroba oil, garlic extract, and citronella oil, emerged as adult workers with lower body mass than control bees, and their survival rates were significantly reduced.9Journal of Insect Science. Acute Toxicity and Sublethal Effects of Botanical Insecticides to Honey Bees
The fact that something is “botanical” or “natural” does not make it safe for pollinators. Rotenone, derived from the roots of certain tropical plants, is another example. It is used as a natural pesticide and has documented toxicity to bees. If you are spraying concentrated essential oils or botanical insecticide products around your garden to deter bees, you may be doing far more damage than just making them avoid your patio. The safer approach is to use living plants whose passive scent discourages bee visits, rather than applying concentrated extracts.
Carnivorous Plants and the Pollinator Trap Problem
You might wonder whether carnivorous plants like Venus flytraps and pitcher plants could serve as a kind of bee deterrent. The answer is not really, but the reason is interesting. Carnivorous plants face what biologists call a conflict of interest: they eat insects for nutrients, but they also need insects to pollinate their flowers. As a result, carnivorous plants have evolved various strategies to separate their prey-catching function from their pollination function, often by producing flowers on tall stalks far above their trapping leaves or by timing their flowering and trapping periods to avoid overlap.10Springer. Pollinator Trapping in Carnivorous Plants
So carnivorous plants are generally not catching bees in meaningful numbers. A Venus flytrap’s trap is too small for most bees anyway, and pitcher plants tend to capture crawling insects more than flying ones. You would not want to rely on them as a bee management strategy, and placing a few pitcher plants on your deck is more of a conversation piece than a functional deterrent.
Practical Strategies That Actually Work
Given the gap between essential oil research and real garden conditions, the most effective way to keep bees away from a specific area combines several approaches rather than depending on any single “miracle plant.”
- Dense aromatic borders: Plant several strongly scented species together rather than relying on one. A border combining peppermint, citronella grass, and wormwood creates overlapping scent clouds that are more noticeable to foraging bees than any single plant alone.
- Remove competing attractants: Bees are drawn to flowers, standing water, and sweet-smelling substances. If you have a flowering garden bed right next to your patio, no amount of mint planted nearby will overpower the pull of open blooms. Move the flowers farther from where you sit.
- Redirect rather than repel: Planting bee-attractive flowers like borage, sunflowers, and clover at the far end of your property gives foraging bees a preferred destination. They will concentrate their visits where the reward is highest, naturally reducing traffic in less rewarding areas.
- Avoid dark or floral-patterned clothing: Bees investigate objects that look or smell like flowers. If you are eating outdoors in a bright floral shirt with a can of sugary soda on the table, nearby mint plants are not going to counteract those signals.
- Keep food covered: Open drinks, fruit bowls, and sticky residues on outdoor tables attract bees and wasps. Physical covers do more than any plant.
The combination of redirecting bees toward attractive plantings elsewhere while making your immediate area aromatically unappealing and visually boring to pollinators is far more effective than any single-plant solution.
Why You Probably Do Not Want a Bee-Free Garden
Most people searching for plants that repel bees have a specific problem: bees are too close to where they eat, play, or relax outdoors, or someone in the household has an allergy. Those are legitimate concerns. But a garden with no bee visits at all is a garden with poor pollination, which means fewer tomatoes, peppers, squash, cucumbers, berries, and fruit from trees. Even ornamental gardens look better when pollinators visit, because cross-pollination strengthens plant health and seed production over time.
It is also worth distinguishing between honeybees, which are generally docile and sting only when threatened, and yellowjacket wasps, which are more aggressive and attracted to protein and sugar sources. Many “bee problems” around outdoor eating areas are actually wasp problems, and the strategies for managing wasps differ. Wasps are drawn to meat and sweet drinks during late summer and fall, whereas honeybees are almost exclusively interested in flowers. If the insects bothering you are hovering around your barbecue and landing on your soda can, you are probably dealing with wasps, and aromatic plants will do little to dissuade them. Wasp traps baited with protein or sugar are a better solution in that case.
The ideal approach for most people is not to repel bees from their entire property but to create a small buffer zone around high-traffic human areas while encouraging pollinator activity everywhere else. A few containers of peppermint on the patio, a border of wormwood along the deck, and a wildflower meadow strip at the back of the yard gives you the best of both worlds: a comfortable outdoor space and a thriving, well-pollinated garden.
Plants Commonly Listed as Bee Repellents That Probably Are Not
Gardening blogs and social media posts confidently list dozens of plants as bee repellents, and some of those claims are poorly supported. Geraniums, for instance, appear on many lists because certain scented geranium cultivars produce citronellol, a compound related to citronella. But most garden geraniums (Pelargonium species) are actually decent pollinator plants, and the amount of citronellol released by a potted scented geranium is minimal. Cucumber plants also appear on some lists, which is strange given that cucumbers depend heavily on bee pollination and their flowers are specifically designed to attract them.
Basil is another frequent entry. While basil’s essential oil contains compounds like linalool and eugenol that show insect-repellent properties in concentrated form, flowering basil is a bee magnet. If you have ever let your basil bolt in midsummer, you have probably seen it swarming with honeybees and bumblebees. The living plant simply does not emit enough volatile compounds to overcome the attractiveness of its own flowers. This reinforces the earlier point about the lab-to-garden gap: a plant can simultaneously be a source of repellent essential oil and a favorite bee forage crop, because the concentrations involved are entirely different.
If you encounter a list claiming that a particular plant “repels bees,” ask whether the source is citing essential oil research or actual field observation of bees avoiding the living plant. In most cases, it is the former being presented as if it were the latter. The plants with the strongest real-world reputations for reducing bee visits are the intensely aromatic species already discussed: mints, citronella grass, pennyroyal, and wormwood, all of which release relatively high levels of volatile oils even without being crushed or processed.