Water-crowfoot
Ranunculus circinatus · Ranunculaceae
The gardener's calendar
Ideal time to plant water-crowfoot: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Spreading buttercup
- Family
- Ranunculaceae
- Type
- Submerged aquatic plant
- Flowering
- Spring to summer (May-July)
- Foliage
- Deciduous, finely divided into filaments
- Hardiness
- Hardy, tolerates cold waters
- Origin
- Temperate and boreal Europe
- Natural habitat
- Shallow flowing waters, lakes and ponds
Care
Aquatic submersion
Grow the spreading buttercup completely submerged in shallow water, ideally between 15 and 60 cm deep. It appreciates soft, clear and well-oxygenated water. Ensure regular water renewal to maintain its quality and prevent stagnation.
Light
Position the plant in a very sunny location, with at least 5 to 6 hours of direct light daily. Generous sunlight promotes vigorous growth and more abundant flowering. Partially shaded areas slow its development.
Substrate and anchoring
Plant it in a substrate rich in organic matter (peat, aquatic soil or loam) at the bottom of the pond or in an aquatic basket. Deep rooting stabilizes the plant against currents and ensures better nutrient uptake. Use perforated baskets to facilitate water exchange.
Nutrition
Apply aquatic fertilizer specifically designed for these plants in spring and early summer to support growth and flowering. Reduce applications as the season ends. Prefer liquid formulations or sticks designed for submerged aquatic plants.
Maintenance and pruning
Regularly remove dead or invasive parts to control its spread. Pinch growing stems to encourage denser branching. Moderate thinning in early summer prevents pond suffocation.
Health and prevention
This robust plant is little susceptible to disease. Watch for harmful algae and maintain good water quality to prevent biological imbalances. In stagnant water, it may suffer from hypoxia; regular oxygenation is beneficial.
Did you know?
The spreading buttercup was once used as an indicator of water quality in European streams. Its abundant presence signaled well-oxygenated and unpolluted water, making it valuable for 19th-century naturalists' hydrological studies. Today, it remains a key plant for restoring degraded aquatic ecosystems.
Where to buy it
Best planted in spring or autumn, away from frost and heatwaves. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September, October.
Add this plant to my garden →Plants from the same family
- Stinking helleboreHelleborus foetidus
- Meadow rueThalictrum aquilegiifolium
- Christmas roseHelleborus niger
- Grecian windflowerAnemone blanda
- Lenten roseHelleborus orientalis
- Hubei AnemoneEriocapitella hupehensis
Tips generated and checked by Viridia — adapt them to your local climate.