Will it grow where I live?
Water chestnut is an annual and grows outdoors across Central Europe – one season from spring sowing to autumn harvest. The summer heat it needs to ripen is out of reach outdoors in Central Europe – greenhouse or conservatory.
Or check it for your location right here:
Profile
- Family
- Lythraceae
- Habit
- Water plant
- Height
- 0.1 m
- Spread
- 0.3 m
- Growth
- fast
- Lifespan
- 1 year
- First yield
- after 1 year
- Yield in cultivation
- up to 4 t/ha
- Energy yield
- 460 kcal per m² a year
- Hardiness
- zone 6–12
- Shade tolerance
- light shade
- Soil
- Silt, Loam
- Soil moisture
- near water – in water
- pH
- 6 – 7.5
Flowering & harvest
| J | F | M | A | M | J | J | A | S | O | N | D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flowering | ||||||||||||
| Fruit harvest |
Uses
Edible: Samen – roh, gekocht oder getrocknet und zu Pulver gemahlen. Süßer, mehliger und angenehmer Geschmack, ähnlich dem von Esskastanien (Castanea spp.). Der Samen enthält laut einem Bericht bis zu 50 % Stärke, 16 % Stärke und 3 % Eiweiß und 15 % Eiweiß und 7,5 % Fett. (Behandeln all diese Berichte dasselbe?) Einem Bericht zufolge enthält die rohe Nuss Giftstoffe, die durch Kochen des Samens zerstört werden.
Medicinal: The fruits are used to produce liniments for treating elephantiasis, pestilential fevers, rheumatism, wounds, sunburn, and skin disorders. 418.
Other uses: Agroforestry Use: The water chestnut can be utilized in wetland restoration projects as a water-loving plant, contributing to habitat creation and water quality enhancement. Its seeds are sometimes used as beads in necklaces and rosaries. The plant can float freely in water or root in the mud of shallow waters. It can also grow in very wet, muddy soils outside of water. Additionally, it is cultivated as an ornamental plant in aquariums and outdoor ponds. 1. Nectar-Rich Flowers: Yes - Water chestnut flowers attract various pollinators, including bees, with their nectar. 2. Wildlife - Food Source (fruits, seeds, leaf litter), Shelter, Nesting, Roosting: Yes - The edible nuts (or fruits) of the water chestnut serve as a food source for wildlife and humans. The plant's structure provides some protection, although it does not offer direct nesting or roosting sites. 3. Shelter for Invertebrates (overwintering sites, leaf litter, ground cover): Yes - The water chestnut can offer shelter to invertebrates, especially in its dense foliage and the aquatic environment where it grows. 4. Pest Confusion (Odor): No - The water chestnut is not generally known for its pest-repelling properties or for confusing pests with its odor.
Growing
A water plant that grows in water up to 60 cm deep, requiring a sunny location in slightly acidic water. It does not tolerate calcium-rich water. Preferring nutrient-rich soil, this plant is hardy in all parts of the country except the coldest regions. While perennial, it is best cultivated as an annual in this country. Some botanists consider this species the only true member of its genus, with all other species seen as merely part of this highly polymorphic species. Occasionally grown for its edible seeds, there is at least one named variety. "Su Zhou" is a form with red fruits. The edible tubers are typically harvested in late summer to early autumn. Water chestnuts usually bloom in summer, growing rapidly and often forming dense mats in suitable aquatic environments.
Propagation
Sow seeds in late summer, overwinter in a glass of water in a cold but frost-free location. The seed quickly loses vitality if it dries out. Plant in spring by placing one seed in each pot and submerging it a few centimeters under water.
Origin & habitat
Central and Southern Europe, Eurasia, tropical and temperate Asia, Africa.
⚠️ Hazards
The nuts are safe to eat once cooked, but raw they can be mildly irritating due to saponins and tannins (varies depending on the type).
Frequently asked questions
Water chestnut: how big does it get?
Water chestnut (Trapa natans) grows as a Water plant and reaches roughly 0.1 m in height when mature, with a spread of about 0.3 m. Growth is fast.
Water chestnut: what site does it need?
Water chestnut tolerates light shade. Suitable soils are Silt, Loam. Soil moisture should be in the range near water – in water. The pH may lie between 6 and 7.5.
Water chestnut: is it hardy?
Water chestnut is listed as hardy in zone 6–12 and survives normal winters outdoors there.
Water chestnut: will it grow in Central Europe?
Water chestnut is an annual and grows outdoors across Central Europe – one season from spring sowing to autumn harvest. The summer heat it needs to ripen is out of reach outdoors in Central Europe – greenhouse or conservatory.
Water chestnut: when does it flower?
In a temperate northern-hemisphere climate it flowers from June to July.
Water chestnut: when is it harvested?
In a temperate northern-hemisphere climate the fruit ripens from September to October.
Water chestnut: when does it start cropping, and how much?
Water chestnut crops in its first year. In cultivation, up to 4 t per hectare is typical. Figures assume a good site; variety, soil and climate shift them considerably.
Water chestnut: is it poisonous?
Individual parts of Water chestnut are noted as mildly problematic — the plant does not count as poisonous. With wild plants, never rely on a database alone, only on a confident identification.
Water chestnut: what is it used for?
Rated on a scale up to 10: Edible 6/10, Medicinal 3/10, Other uses 3/10.
Plan this plant into your own garden
Permaplans plans your garden to scale on the map — with a site check, harvest calendar and over 1,000 plants. Free for iPhone, Android, Mac, Windows & Linux.
Will this plant grow where you live? → Check your site
Community experience
What Permaplans users wrote about this plant – taken from the app as is. 1 post.
my comment is that these are very invasive in North America so I will not be cultivating any. Also, I grew up loving to eat canned "water chestnuts" but looked it up and they are Chinese Water Chestnut (Eleocharis dulcis.) I note this in case anyone else is confused like i was. 😅
Growing it? Write in the app what works for you – your post will show up here.
💬 Get the app and join in