Geraniums contain mosquito-repellent geraniol. Florist geraniums have the greatest geraniol. Geraniums aren't cold hardy but can be grown outdoors in summer. They like sunshine.

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1. Geraniums

 2. Citronella Geraniums

Citronella Geraniums aren't citronella. Both are efficient insect repellents, although their oils differ. Geranium has more citronellol than grass. In insect-repelling candles and torches.

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3. Lemongrass

Lemongrass has mosquito-repelling citral and geraniol[1]. "Natural" mosquito repellents contain citronellol, limonene, and linalool. In damp climates, lemongrass thrives. Divvy up large clumps. Some areas overwinter well.

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4. Lemon Balm

Contains rosmarinic acid, citronellol, and geraniol. Rosemary is acidic. Lemon balm makes a delicious tea. Invasive if the black seeds spread into the lawn. My dog did it. Mowing near them releases their oils.

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5. Lavender

Lavender contains mosquito-repellent pinene and linalool. These two compounds in lavender repel mosquitoes. In well-drained soil, lavender thrives. The leaves contain as much oil as the flowers in the first year.

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6. Marigolds

Marigolds prevent potato bugs, according to an old saying. It's tagetone and limonene. [2] Tagetone's presence in the garden repels mosquitoes. Marigolds are annuals with yellow and orange flowers.

7. Eucalyptus

In most places, Eucalyptus is ornamental, but in Australia and the Gulf Coast, it's a weed. In mild climates, winterize in a pot. Eucalyptus has mosquito-repelling pinene and limonene.

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Rosemary is used in cooking. It contains rosmarinic acid, pinene, and borneol, which repel mosquitoes.

8. Rosemary

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9. Lantana 

Lantana, an African native, has naturalised in the Everglades. The leaves' odour can help keep mosquitoes away. Two lantana compounds (lanatoside and lantanone) are being studied.

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