Ranunculus penicillatus
Ranunculus penicillatus · Ranunculaceae
The gardener's calendar
Ideal time to plant ranunculus penicillatus: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Brush Buttercup
- Family
- Ranunculaceae
- Type
- Submerged aquatic plant
- Natural habitat
- Temperate watercourses in Europe and Asia
- Flowering
- May to August
- Foliage
- Deciduous, finely divided underwater
- Hardiness
- Hardy down to -15 °C
Care
Immersion and water circulation
This buttercup develops entirely submerged or partially immersed in watercourses. It requires clear, cool, and well-oxygenated water, with moderate current to thrive. In an aquarium or pond, ensure regular water renewal and sufficient aeration. Avoid stagnant waters that are too warm, as these promote algae proliferation.
Aquatic lighting
Place this plant in a zone receiving moderate to strong light, between 4 and 8 hours of natural or artificial light per day. Good lighting stimulates photosynthesis and the development of filiform leaves. However, excessive exposure can encourage algae; partial shade may suit very sunny environments.
Substrate and fixation
Plant it in a nutrient-rich substrate: coarse sand mixed with aquatic potting soil or peat. It anchors through a poorly developed root system; light fixation with stones or stabilized substrate is sufficient. Avoid fine substrates that will dissolve in water.
Gentle fertilization
Apply a balanced fertilizer for aquatic plants, diluted and liquid, once or twice monthly during the growing season. Waters that are too nutrient-rich encourage algae; favor moderate fertilization. In natural environments, it benefits from nutrients brought by the current.
Maintenance and pruning
This plant requires minimal care. Remove browned or rotted parts to maintain water clarity. In a pond, you can slightly reduce invasive clumps in late autumn or early spring. Pruning encourages dense and branched regrowth.
Problem prevention
In enclosed environments, watch for filamentous algae and rot caused by stagnant or nutrient-overloaded water. Well-oxygenated water and regular current limit these risks. In an aquarium, regularly clean the filter to maintain optimal water quality.
Did you know?
The Brush Buttercup owes its French vernacular name to the extreme fineness of its divided leaves, which resemble the delicate hairs of a brush. It plays a crucial ecological role in European rivers and streams, where it stabilizes sediments and provides refuge for aquatic insects and fish fry. Once abundant, it is becoming rarer in channelized or polluted watercourses.
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.