How to Grow Mosquito Plant
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Mosquito Plant
Plectranthus caninus
herbMosquito Plant is a fast-growing, bushy perennial herb known for its pungent foliage that allegedly repels mosquitoes and other insects. The plant produces small purple or blue flowers and aromatic leaves with a distinctive scent. It's often grown as a potted houseplant or garden specimen for both ornamental appeal and pest control purposes.
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Example Mosquito Plant timeline · Pittsburgh, PA (Zone 6b)
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Plant Mosquito Plant
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Mosquito Plant
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Mosquito Plant dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11; grown as an annual or indoor plant in colder climates
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Seedling
2-3 weeksSmall tender shoots with 2-4 true leaves emerging from soil
Keep soil consistently moist; provide bright indirect light; maintain warmth (65-75°F); thin seedlings to prevent crowding
Vegetative Growth
4-6 weeksRapid branching and leaf development; plant becomes bushy with multiple stems
Pinch back growing tips to encourage bushiness; provide full sun; fertilize every 2-3 weeks with balanced fertilizer; water regularly
Flowering
6-12 weeks (intermittent throughout growing season)Small purple, blue, or occasionally white flowers appear in terminal clusters along stems
Continue regular watering and feeding; deadhead spent flowers to encourage more blooms; the foliage remains the primary ornamental feature
Mature Plant
Ongoing (perennial in warm zones)Full, dense shrubby form with established woody stems and abundant aromatic foliage
Prune regularly to maintain shape and bushiness; harvest leaves as needed; reduce watering and fertilizer in winter; bring indoors in cold climates
Winter Dormancy
3-4 monthsIn zones 9b-10, plant may lose some foliage; in cooler climates, grown as annual or moved indoors
Reduce watering significantly; stop fertilizing; provide bright light indoors; overwater protection critical to prevent root rot
Common Pests
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Spray with water to dislodge; use insecticidal soap; increase humidity; neem oil in severe cases
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Yellow sticky traps; insecticidal soap; neem oil; ensure good air circulation
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Remove with cotton swab dipped in alcohol; spray with insecticidal soap; isolate affected plants
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Hand-pick; horticultural oil; neem oil spray; prune heavily infested stems
Uses
Mosquito and Insect Repellent
HouseholdThe plant's essential oils, particularly the compound found in its foliage, are believed to repel mosquitoes, flies, and other insects. Crushed leaves release stronger odor that can be rubbed on skin or placed around seating areas for natural pest control. [source]
Culinary Herb
CulinaryWhile strong-scented, fresh young leaves can be used sparingly to flavor teas, soups, and broths. The flavor is peppery and minty with an herbaceous quality. Best used in small amounts due to potency. [source]
Traditional Herbal Remedy
MedicinalIn traditional medicine, leaf decoctions are used to treat digestive issues, respiratory problems, and fever. The plant contains compounds with potential antimicrobial and anti-inflammatory properties. [source]
Garden Accent Plant
OrnamentalThe bushy form, aromatic foliage, and delicate flowers make it attractive as a potted specimen, border plant, or container plant in warm climates. Rapid growth makes it ideal for filling garden spaces quickly. [source]
Dried Herbal Arrangement
CraftDried leaves and flower stems can be added to dried herb arrangements, potpourri, or sachets for their aromatic qualities and natural pest-repelling properties. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Pinch off leaves and stem tips regularly once plant reaches 6-8 inches tall to encourage bushiness and promote harvesting. Harvest in the morning after dew dries for strongest scent. Remove outer leaves first, allowing inner growth to continue. Leaves can be used fresh or dried. Cut back by one-third in early spring to rejuvenate growth.
Fun Facts
- 🌱 Mosquito Plant is also known as 'Plectocephalus' or 'Citronella plant,' though it is botanically distinct from true citronella grass (Cymbopogon nardus). Despite its common name, scientific evidence for mosquito repellency is limited compared to its traditional reputation.
- 🌱 The plant grows extremely rapidly—seedlings can reach 12+ inches tall within 4-6 weeks under favorable conditions, making it one of the fastest-growing Plectranthus species.
- 🌱 Plectranthus belongs to the mint family (Lamiaceae) and originated in the highlands of South Africa. The genus contains over 350 species, many with aromatic properties and traditional medicinal uses across African cultures.
Gardening Terms
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