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Common duckweed – Lemna minor

Common duckweed

Lemna minor
Protein-rich cleansing water cover.
Edible value6Medicinal value4Other uses9
Water plant0×0 mzone 4–8light shade🍎 Edible

Will it grow where I live?

Common duckweed is an annual and grows outdoors across Central Europe – one season from spring sowing to autumn harvest.

Or check it for your location right here:

Winter hardiness by USDA zone, summer warmth by heat sum – the same values the app and the plant finder use.

Profile

Family
Araceae
Habit
Water plant
Height
0 m
Spread
0 m
Growth
fast
Lifespan
1 year
Yield per plant
up to 0 kg
Hardiness
zone 4–8
Shade tolerance
light shade
Soil moisture
near water – in water
pH
3 – 10
Synonyms
Entengrütze
evergreen

Uses

Edible6 of 10
Medicinal4 of 10
Other uses9 of 10

Edible: Occasionally used as a vegetable. No further details provided, but we have found the taste to be undesirable.

Growing

Duckweed thrives in sunny areas of calm water rich in nitrates and calcium. While it can be a nuisance pond weed, it is easily controlled by skimming. The skimmed material is excellent for adding to compost piles. This plant serves as a valuable food source for fish and birds, also providing shelter for pond organisms. In temperate regions, Duckweed survives winter through dormant buds sinking to the pond bottom in late autumn and resurfacing in spring.

Propagation

Seeds - We have no information about this species, but since it spreads quickly through division, it actually does not need any additional assistance once it is in a pond.

Notable

Features: spreads through budding in stagnant waters; overwinters through dormant buds sinking to the pond bottom in late autumn & resurfacing in spring; purifies the water; plant collects+stores minerals, meaning e.g. its radium content is 100-600 times higher than in the surrounding water.

Origin & habitat

A cosmopolitan plant found in most regions of the world, but absent in the tropics.

Forests, hedges, and shaded areas where trees, walls, etc., climb and creep over the ground. Found on all types of terrain.

Frequently asked questions

Common duckweed: how big does it get?

Common duckweed (Lemna minor) grows as a Water plant and reaches roughly 0 m in height when mature, with a spread of about 0 m. Growth is fast.

Common duckweed: what site does it need?

Common duckweed tolerates light shade. Soil moisture should be in the range near water – in water. The pH may lie between 3 and 10.

Common duckweed: is it hardy?

Common duckweed is listed as hardy in zone 4–8 and survives normal winters outdoors there.

Common duckweed: will it grow in Central Europe?

Common duckweed is an annual and grows outdoors across Central Europe – one season from spring sowing to autumn harvest.

Common duckweed: is it poisonous?

No toxicity is recorded for Common duckweed. With wild plants, never rely on a database alone — only on a confident identification.

Common duckweed: what is it used for?

Rated on a scale up to 10: Edible 6/10, Medicinal 4/10, Other uses 9/10.

Community experience

No first-hand reports for this plant yet.

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