Water crowfoot
Ranunculus aquatilis · 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
- Scientific name
- Ranunculus aquatilis
- Family
- Ranunculaceae
- Type
- Perennial aquatic plant
- Foliage
- Deciduous
- Flowering
- May to August
- Hardiness
- Very hardy (-15 °C and beyond)
- Natural habitat
- Freshwaters of temperate Europe
- Growth
- Rapid under favourable conditions
Care
Immersion and circulation
Water crowfoot must be permanently submerged in fresh, still or slowly moving water. Maintain a depth of 15 to 60 cm depending on the variety. Slight water circulation prevents silting and promotes overall plant health.
Light
Choose a sunny to partially shaded location, ideally 4 to 6 hours of direct sunlight daily. The plant tolerates partial shade but will flower more abundantly in sun. Avoid heavily shaded waters, which slow growth.
Substrate and anchoring
Plant in a substrate rich in organic matter (mud, aquatic compost or a mix of soil and sand). A slightly silty bottom promotes natural rooting. You can use aquatic baskets to contain it in a garden pond.
Fertilisation
In natural settings, the plant draws nutrients from the water and substrate. In a closed pond, a light application of aquatic fertiliser in spring stimulates growth. Be restrained: excess nitrogen encourages algae at the expense of flowers.
Maintenance and cleaning
Regularly remove rotting or invasive parts that slow water circulation. You can divide plants in spring to rejuvenate ageing colonies. Simply clean the floating foliage without drastic pruning.
Health and pests
Water crowfoot resists disease well in flowing, well-oxygenated water. Prolonged stagnation or eutrophication promote rot. Aquatic herbivores (snails, ducks) may graze on it: accept this natural phenomenon or install light protection if needed.
Did you know?
Water crowfoot has two distinct leaf forms: fine, feathery leaves underwater, which offer little resistance to currents, and rounded leaves on the surface, adapted for floating. This remarkable plasticity allows it to adapt to varying depths within the same ecosystem. Historically, it fascinated botanists because it challenges the fixed notion of plant form.
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
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Tips generated and checked by Viridia — adapt them to your local climate.