Rootless Duckweed

Wolffia arrhiza

Family : Araceae

PlantFreshwaterfloating

The world's smallest flowering plant, forming green floating dots without roots.

Rootless Duckweed — photo 1 sur 4 — Christian Fischer · Wikimedia Commons · CC BY-SA 3.01 / 4

Popularity

Easy plant

standard lighting, few requirements

Availability

Common in shops

Shop availability

IUCN Status

Least Concern

Description

Wolffia arrhiza is a tiny floating plant (0.1-0.2 mm) spherical or ellipsoidal in shape. It has no roots or stems, only a vegetative body. It reproduces by rapid budding. It forms a green carpet on the water surface. It is very rich in protein and used as fish food. In aquariums, it can proliferate quickly.

Habitat

Region :

Calm, nutrient-rich waters

Distribution :

Recommended parameters

Temperature20–30 °C

pH6–8

GH2–15 °dGH

KH1–10 °dKH

NO₃

≤ 30 mg/L

PO₄

≤ 3 mg/L

CO₂

≤ 0 mg/L

Light

Low

Care

Difficulty

1/5

Diet

Photosynthetic

Min. tank

5 L

Min. group

Adult size

0.2 cm

Lifespan

1 years

Temperament

Peaceful

Propagation

Fragmentation

Care notes

Parameters: temperature 20-30°C, pH 6-8, GH 2-15, KH 1-10. Low to moderate lighting. No CO2. Very fast growth in nutrient-rich water. Remove regularly to avoid smothering the aquarium. Compatible with all fish. Minimum tank volume 5 L. Ideal for fry tanks.

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