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Water Mint

Mentha aquatica

aquatic

Water Mint is a vigorous semi-aquatic herb with aromatic, slightly hairy leaves and distinctive purple or pink flower spikes blooming in mid to late summer. It thrives in wet soils, shallow water margins, and ditches, spreading rapidly via runners. Excellent for wetland habitat creation, it also yields fragrant foliage useful for tea and culinary applications.

Water Mint

Common Problems

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

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Powdery Mildewchevron_right
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Slow Growthchevron_right
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Pale Leaveschevron_right
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Underwateringchevron_right

Care Guide

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Light
Full sun to partial shade; requires 4–6 hours minimum sunlight; more sun enhances oil content
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Water
Consistently wet to waterlogged soil or shallow water (1–4 inches/2.5–10 cm depth); thrives in boggy margins; container culture requires constant moisture
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Soil
Fertile, moisture-retentive soil enriched with organic matter; tolerates poor or acidic substrates; prefers pH 6–7
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Fertiliser
Moderate feeding; monthly balanced liquid fertilizer during growing season; benefits from organic compost mulch
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Temperature
Temperate to cool; hardy to 40°F (4°C); dormant in winter; best growth 55–70°F (13–21°C)
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Humidity
Requires very high humidity and constant soil moisture; dries out quickly in warm, dry conditions

Toxicity

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Safe; culinary and medicinal herb; no toxicity reported; used in teas and folk remedies

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.