10 Insect Repellent Plants Worth Growing In Pots And Beds

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10 Insect Repellent Plants Worth Growing In Pots And Beds

Hallie Renner19.08.2026

I've grown every plant on this list at some point — most of them in the same terracotta pots along my hot south wall, a few in the cutting garden from my market-flower years. Before I hand you ten plants, one honest note from a former seed-trial employee: a pot of lavender sitting near your patio chair is not the same as lavender oil applied to skin, and I'll say where the gap is on each one. What follows is what actually grew, what actually held up in Boise's dry heat and wind, and what I'd plant again.

Lavender

Lavender is the one plant on this list that genuinely loves my conditions — alkaline, low-rainfall, zone 7a soil that I've spent a decade amending for everything else. English lavender (Lavandula angustifolia) doesn't want rich amended soil at all; it wants exactly the lean, fast-draining ground most of us are fighting against for vegetables.

• Grows best in: full sun, gravelly or sandy soil, minimal irrigation once established
• Repellent claim: the volatile oils in the leaves and flowers do deter some insects, but mainly when the foliage is bruised or brushed against — not just from standing nearby
• Zone note: hardy to zone 5, so it overwinters outdoors here without protection, unlike several plants further down this list

I wrote catalogue copy for a seed company for seven years, and 'naturally pest-repelling' sold a lot of lavender that was really just being sold on scent and looks. Both are good reasons to grow it — I just don't want you buying it purely as bug spray.

Cut stems for the house and rub a few leaves on your wrist before you decide how much to expect from it.

Catnip

Catnip (Nepeta cataria) has the best data behind it on this whole list — the compound nepetalactone, extracted and concentrated, has outperformed DEET in lab tests against mosquitoes. Growing the plant in a pot on your patio is a much gentler version of that effect, but it's a real one, especially when you crush a leaf between your fingers as you walk past.

What I didn't expect the first year: how aggressively it self-seeds. I let one plant go to flower near my cutting garden and spent the next two summers pulling volunteers out of the gravel path. If you don't want a spreading patch, deadhead before it sets seed or grow it in a container with the pot sitting on a hard surface, not soil.

• Sun: full sun to light shade
• Water: drought-tolerant once established, which suits my eleven inches of annual rainfall just fine
• Caution: genuinely attractive to cats, who will flatten a young plant fast — cage it while it establishes

It's an easy, low-drama perennial either way, and the flowers pull in bees, which is its own kind of trade.

Lemongrass

Lemongrass (Cymbopogon citratus) is the plant whose oil actually shows up in commercial citronella candles, so the association isn't marketing — it's chemistry. What's missing from most of the pretty patio graphics is that lemongrass is not remotely hardy in zone 7a. It's a tropical grass rated to about zone 9, and a Boise winter kills it outright.

I grow it exactly one way now: in a 5-gallon pot that spends summer on the hot south wall where it gets full sun and grows fast, then comes inside near a bright window before our first frost, which typically lands mid-October here. Count back from your own first frost date, not mine, if you're colder or warmer than zone 7.

• Container size: at least 5 gallons — it's a big, clumping grass by August
• Water: regularly through summer heat, it doesn't like drying out completely
• Harvest: cut stalks for tea or cooking any time; it regrows from the base

Bruising or cutting the leaves releases far more scent than an intact plant standing still, which is worth remembering with anything grown for its oils.

Petunias

I'll be straight with you on this one: petunias are the plant on this list I'm most skeptical of as a genuine insect deterrent. They're vigorous, they bloom nonstop through Boise's brutal July heat, and gardeners have long noted they seem to discourage aphids and some leafhoppers around companion plantings — but the research is thin compared to the herbs on this list, and I wouldn't plant them expecting fewer mosquitoes.

What they're excellent at is filling containers and hanging baskets fast, cheap, and colorfully, which is reason enough on its own.

• Best varieties for heat: Wave and Supertunia series hold up better to wind and full sun than older bedding types
• Container: at least 1 gallon of soil per plant, more for baskets
• Water: daily in real summer heat — petunias in a small pot dry out fast
• Maintenance: pinch spent blooms on older varieties to keep flowering; self-cleaning types skip this step

Plant them for the color and the pollinators they bring in, and treat any pest benefit as a bonus, not the reason.

Bee Balm

Bee balm (Monarda) is a genuinely funny plant to put on an insect-repelling list, because its whole strategy is attracting pollinators — bees, hummingbirds, and butterflies all come for the tubular flowers. The mosquito-deterrent reputation comes from its strongly scented, oil-rich foliage, which some studies suggest has a mild repellent effect when crushed, similar to catnip's mechanism.

In my zone 7a beds, bee balm has been a reliable, cold-hardy perennial — it comes back every spring without fuss and doesn't need winter protection. The one issue I've had is powdery mildew in years with a wet, humid stretch, though that's rarer here than in most climates.

• Sun: full sun to part shade
• Spacing: give it room, it spreads by rhizomes over a few seasons
• Good pairing: plant it where you want pollinator traffic, not right by the patio table where you're trying to avoid bees

It's a plant I'd grow for the flowers alone, with any bug-discouraging benefit treated as incidental.

Marigold

Marigolds are the plant every companion-planting list leans on hardest, and here's the part that actually holds up: French marigolds (Tagetes patula) suppress root-knot nematodes in soil when their roots decompose in place over a season, which is documented, real, and useful if nematodes are a problem in your beds. The above-ground claim — that living marigolds repel flying insects by scent — has much weaker evidence behind it.

None of that changes how useful they are in my garden. They're cheap, they germinate fast from seed (I've had upward of 90% germination in under a week in warm soil), and rabbits and deer generally leave them alone, which matters more to some of my readers than mosquitoes ever will.

• Direct sow: after your last frost date, once soil has warmed
• Sun: full sun for the tightest, most floriferous plants
• Deadhead: regularly to keep them blooming through the season

Plant them for the border color and the nematode benefit if you have it — count the flying-insect deterrence as a maybe.

Rosemary

Rosemary is the plant on this list best matched to my actual soil, if not my winters. It wants exactly the fast-draining, lean conditions Boise's alkaline dirt naturally provides, and once established it barely wants irrigation — a genuine relief on eleven inches of annual rainfall. Its resinous oil has a real, if mild, deterrent effect on some insects when the foliage is disturbed.

The catch is hardiness. Most rosemary varieties are reliably hardy only to about zone 8, and zone 7a winters are a gamble — I've lost more than one in-ground rosemary plant to a hard freeze after treating it like a permanent shrub. I now grow it in a pot that overwinters in an unheated but frost-free garage, or I treat it as an annual and don't grieve it.

• Soil: gritty, well-drained — amend with sand or perlite if your bed holds water
• Sun: full sun, minimum six hours
• Pruning: harvest regularly; it responds well to being cut for cooking

Check your own zone before you commit to an in-ground rosemary hedge — mine taught me the hard way.

Basil

Basil earns its spot in the vegetable garden regardless of any pest claims, but it's worth separating fact from folklore here. The idea that basil repels mosquitoes goes back generations, and while the essential oils do have some documented deterrent effect in concentrated form, a basil plant sitting quietly in a pot is not going to clear your patio of bugs on its own.

What it will do is give you an easy, fast, forgiving herb that pairs beautifully with tomatoes in the vegetable beds, which is where I actually grow most of mine. In my notebooks, Genovese basil has germinated at close to 90% within a week in warm soil, and grown to harvestable size within about six weeks.

• Water: consistent moisture, especially in containers — it wilts fast in dry heat and wind
• Sun: full sun, though afternoon shade helps in the hottest weeks
• Pinch flowers: to keep leaf production going instead of bolting to seed

Grow it to cook with. Any bug benefit is a pleasant extra, not the reason to plant a row of it.

Ornamental Allium

Ornamental onion (Allium giganteum and its relatives) belongs to the same family as garlic and culinary onions, which have some of the more credible research behind them for deterring aphids and a handful of other soft-bodied pests through their sulfur compounds. The showy purple globes are grown mainly for structure and height in a border, but the family resemblance to genuinely repellent alliums is real.

One safety note before you plant

All alliums — ornamental and edible — are toxic to dogs and cats if chewed or eaten in enough quantity. If you have a curious dog or a garden cat, check the ASPCA's toxic plant list and place bulbs where pets aren't likely to dig, rather than relying on my judgment or anyone else's on this.

• Plant: bulbs in fall, well before ground freeze
• Hardy: reliably through zone 7a without protection
• Height: up to 3 to 4 feet, striking at the back of a border

I grow these for the shape they add to a cutting garden bed, with the pest-deterrent reputation as a secondary reason, not the main one.

Citronella Geranium

The 'mosquito plant,' sold in every garden center each May as Pelargonium citriodorum or 'citrosum,' is probably the single most overstated plant on this list — and I say that having helped write seed and plant catalogue copy for years. It genuinely smells like citronella when you rub the leaves, which is where the marketing comes from, but independent testing has repeatedly found the intact, growing plant does very little to actually reduce mosquito bites nearby. The oil works when extracted and concentrated, not while it's sitting in a pot doing nothing but photosynthesizing.

None of that means skip it — it's a genuinely nice-smelling container plant with attractive lacy foliage, and rubbing a leaf on your skin before you sit outside does something, even if modest.

• Zone note: not hardy in zone 7a — treat as an annual or bring the pot indoors before frost
• Sun: full sun for the best scent concentration in the leaves
• Soil: well-drained, don't overwater

Grow it for the fragrance on your patio table, and keep your expectations for actual mosquito reduction modest.

None of these ten plants replace a screened porch or an actual repellent when the mosquitoes are bad, but they earn their space for other reasons too — color, pollinators, cooking, structure in a border — and the modest bug benefit is a nice thing to have alongside all that, not the whole reason to plant them.

Hi! I'm Hallie

Hi, I'm Hallie! Seven years in a seed company trial garden, six years running a small cut-flower market garden, and fifteen years of notebooks from…

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