Lamiaceae
Water Mint (Mentha aquatica)
Mentha aquatica
Water mint is an easy, vigorous plant best suited to boggy soil or shallow water at a pond margin, though it also thrives in a moisture-retentive container kept constantly wet. Give it full sun to partial shade, never let the soil dry out, and trim it back occasionally to keep growth dense and prevent it from spreading beyond its space.
Every 2 days
Bright indirect
10° - 27°C
60% - 90%
Categories
What is Water Mint?
Water Mint (Mentha aquatica) is a easy-care plant from the Lamiaceae family. Mentha aquatica, commonly known as water mint, is an aromatic perennial herb in the mint family (Lamiaceae), native to Europe, North Africa, and western Asia. It grows naturally along pond edges, streams, ditches, and marshy meadows, where its square stems and oval, toothed leaves spread rapidly by...
Water Mint grows up to 90cm, spread of 100cm, watering every 2 days, 10°C – 27°C, 60–90% humidity. It is suitable for indoor environments and safe for pets.
Unlike many tropical plants, Water Mint tolerates watering mistakes. Best for beginners. Unlike many popular species, Water Mint is safe to keep around pets. Without adequate drainage, root rot can develop within 7 days.
How to Care for Water Mint?
TLDR: Water Mint needs Bright indirect, watering every 2 days, and temperatures between 10-27°C with 60-90% humidity.
How Often Should You Water Water Mint?
Keep the soil saturated at all times, or grow water mint directly in shallow water up to about 5-8 cm deep. It tolerates being submerged far better than it tolerates drying out, so err on the side of too much water rather than too little.
How Much Light Does Water Mint Need?
Full sun produces the most compact, flower-rich growth, but water mint also tolerates partial shade, especially in hot climates where some afternoon cover prevents leaf scorch.
What Is the Best Soil for Water Mint?
Grow in rich, loamy or boggy soil with a slightly acidic to neutral pH of about 6.0 to 7.0. Heavy, water-retentive soil is ideal since this plant naturally grows with wet roots.
What Pot Should You Use for Water Mint?
Best grown in a container without drainage, or standing in a saucer kept topped up with water, since water mint performs best with its roots constantly wet.
Care Schedule
Fertilize
Every 30 days
Repot
Every 365 days
What Is Water Mint and Where Does It Come From?
Mentha aquatica, commonly known as water mint, is an aromatic perennial herb in the mint family (Lamiaceae), native to Europe, North Africa, and western Asia. It grows naturally along pond edges, streams, ditches, and marshy meadows, where its square stems and oval, toothed leaves spread rapidly by creeping runners. From midsummer into fall, dense whorls of small pink to lilac flowers cluster at the stem tips, attracting bees, butterflies, and other pollinators. Every part of the plant carries a strong minty-menthol fragrance, released readily when the leaves are brushed or crushed.
How to Propagate Water Mint?
Stem cutting in water
Roots form quickly since this plant is naturally adapted to growing in water, so cuttings rarely fail.
- 1 Cut a 10-15 cm stem tip just below a leaf node
- 2 Remove the lower leaves and place the cutting in a glass of water
- 3 Keep in bright, indirect light and change the water every few days
- 4 Once roots are 2-3 cm long, transplant into wet soil or a pond margin
Materials needed:
Division of runners
Water mint spreads aggressively by runners, so divisions are abundant and establish almost immediately.
- 1 Lift a section of the spreading mat where runners have rooted at the nodes
- 2 Cut the rooted segment away from the parent plant with a clean tool
- 3 Replant the division immediately into moist soil or shallow water
- 4 Water thoroughly and keep consistently wet until new growth appears
Materials needed:
How Big Does Water Mint Grow?
TLDR: Water Mint can reach up to 90cm tall with Fast growth rate.
Max height
90cm
Spread
1.0m
Growth rate
Fast
Foliage
Deciduous
Plant Uses
Aromatic
Pleasant fragrance
Edible
Can be consumed
Medicinal
Medicinal properties
Ornamental
Great for decoration
Medicinal Uses
- Traditionally brewed as a tea for digestive discomfort and colds
- Leaves used in poultices or balms for minor skin irritation
- Steam inhalation with the leaves used to ease congestion
Culinary Uses
- Fresh leaves flavor salads, sauces, and cold soups
- Used in herbal teas and infused syrups
- Garnishes desserts and mixed drinks
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Water Mint?
TLDR: Water Mint is susceptible to 7 known diseases. Monitor regularly for early detection.
Rust
Rust is a common fungal disease caused by fungi in the order Pucciniales that affects a wide variety of plants. The disease gets its name from the characteristic orange, yellow, or reddish-brown pustules that appear on leaves, resembling metal rust. This obligate fungal parasite requires living plants to survive and can cause significant economic losses in agricultural crops.
Powdery Mildew
Powdery mildew is a common fungal disease caused by various fungi species including Erysiphe, Podosphaera, Oïdium, and Leveillula. It affects over 10,000 plant species worldwide. The disease thrives in warm, dry climates with high humidity and appears as a distinctive white powdery coating on plant surfaces.
Aphids
Aphids are small, soft-bodied, pear-shaped insects (1/16 to 1/8 inch long) that feed by sucking nutrient-rich sap from plants. They reproduce rapidly and can quickly weaken plants, causing distorted growth and transmitting plant viruses. Aphids come in various colors including green, black, red, yellow, brown, and gray. They secrete honeydew, a sticky substance that attracts ants and encourages sooty mold growth.
Spider Mites
Spider mites are tiny arachnids (less than 1/20 inch long) related to spiders and ticks that feed on plant sap. They thrive in hot, dry conditions and can cause significant damage to ornamental and vegetable plants. During severe infestations, crop losses can reach 14% or higher as these pests disrupt vital plant processes including photosynthesis, carbon dioxide absorption, and transpiration.
Meaning & Symbolism
Water mint has long been linked to hospitality, healing, and refreshment; its cooling, menthol-scented leaves near flowing water evoke cleansing and renewal in folk tradition.
Fun Facts
Water mint is one of the parent species of peppermint (Mentha x piperita), a natural hybrid with spearmint.
A single water mint plant can spread into a dense mat within weeks thanks to its fast-rooting runners.
Crushing the leaves releases a strong menthol scent that has made water mint a traditional insect repellent.
Frequently asked questions
Does water mint need to grow in water?
Is water mint invasive?
Can I eat water mint?
Is water mint toxic to pets?
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Field Maple | Easy | Bright indirect | 14d | ✓ |
| Silver Birch | Easy | Direct sun | 14d | ✓ |
| Common Blanketflower | Easy | Direct sun | 10d | ✓ |
| Cushion Bush | Easy | Direct sun | 14d | ✓ |
