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Mint Pennyroyal

Mentha pulegium

herb

Pennyroyal is a low-growing creeping mint with small, delicate leaves and a peppermint-like scent traditionally used in herbal preparations and as a natural insect repellent. It spreads via runners and self-seeding, making it excellent as ground cover in herb gardens. The plant produces small purple or white flowers and has a long history of use in folklore and natural remedies.

Mint Pennyroyal

Common Problems

Select the problem your Mint Pennyroyal is experiencing to get a treatment guide.

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Underwateringchevron_right
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Yellow Leaveschevron_right
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Slow Growthchevron_right
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Wiltingchevron_right

Care Guide

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Light
Full sun to partial shade (5+ hours of sun daily)
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Water
Keep soil moist but well-drained; more drought-tolerant than other mints once established
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Soil
Well-draining soil with pH 6.0–7.5; tolerates poorer soil conditions
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Fertiliser
Light feeder; minimal fertilizer needed; light application of balanced fertilizer in spring
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Temperature
Prefers 55–70°F (13–21°C); less cold-hardy than other mints, may need winter protection in zone 5
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Humidity
Moderate humidity; prefers drier conditions than other mints

Toxicity

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Contains pulegone, a volatile oil that is toxic in concentrated forms. Keep away from pets and children; not safe for internal use. Can cause liver and kidney damage.

Common Diseases

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Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.