Ranunculus Inundatus care guide
Ranunculus Inundatus (Ranunculus inundatus) — medium light, 18-26 °C, pH 6-7.5, no CO2.
Compiled by Aquairi from published sources · Published · Updated
Overview
Ranunculus Inundatus (Ranunculus inundatus) is an aquatic plant of the family Ranunculaceae, listed in the Aquairi knowledge base as an intermediate-level species. It is typically grown under medium light and without obligatory CO2 injection on nutrient-rich aquasoil. Australian foreground plant with star-shaped, deeply divided leaves on slender stalks. Spreads by runners; appreciates good lighting and CO2 to stay compact and bright.
Taxonomy
- Family: Ranunculaceae
- Genus: Ranunculus
- Scientific name: Ranunculus inundatus
- Common synonyms: River Buttercup
Habitat
Ranunculus is a large genus of buttercups (Ranunculaceae); a few amphibious species from cooler New World and Asian waters are grown submersed, with crinkled, fern-like foliage. In the Aquairi knowledge base, populations associated with this form are recorded from Oceania.
Growth requirements
- Lighting: medium
- CO2: not required
- Temperature: 18-26 °C (64-79 °F)
- pH: 6-7.5
- GH: 3-14 °dGH
- Substrate: nutrient-rich aquasoil
- Maximum height: 8 cm
- Growth rate: medium
- Recommended placement: foreground
Placement
A midground accent or low-background stem; bright light intensifies the bronze-green colour, and the plant prefers cooler, well-oxygenated water. In the Aquairi knowledge base this form is recommended for the foreground under medium light and without obligatory CO2 injection, using nutrient-rich aquasoil.
Propagation
Propagated by runners and division; daughter plants form along creeping stems and are separated once rooted. Documented propagation techniques for this entry include: horizontal runners.
Common issues
Prolonged warmth weakens submersed growth, so cooler water suits it best; shading produces pale, elongated leaves.
Propagating River Buttercup (Ranunculus inundatus)
Overview
River buttercup (Ranunculus inundatus) is a buttercup species from eastern Australia that has become popular in freshwater aquascaping and nano aquariums. It is a low foreground plant with star-shaped, deeply divided umbrella-like leaves on slender stalks, growing from a creeping base that spreads sideways across the substrate.
According to Tropica it forms many vertical runners bearing new plants, and over time a thick bottom coverage develops. Propagation is therefore vegetative: divide the creeping rhizome and the runner-borne plantlets, not the leaves.
Propagation Method
Let the plant spread on its own runners, then divide. Lift a clump, separate the runners with their attached plantlets, and replant each piece. Each runner plantlet already has its own roots, so the new patch fills in quickly and forms fresh coverage.
Step-by-Step
- Wait until the parent has sent out several runners with rooted plantlets.
- Gently lift the clump or expose the creeping rhizome in the substrate.
- Separate the runners, keeping each plantlet's roots intact.
- Cut the rhizome between plantlets if needed so each piece carries roots and leaves.
- Replant the divisions in nutrient-rich substrate, spaced a few centimetres apart.
- Prune any long leaves to keep the patch compact while it establishes.
Conditions for Healthy Growth
Tropica rates Ranunculus inundatus as a medium-light plant (about 0.5 W/L) with a medium CO2 demand (6-14 mg/L) and medium growth rate, reaching roughly 5 cm in around two months. Good lighting produces compact growth with distinctly cut umbrella leaves; the knowledge base lists 18-26 C, pH 6-7.5 and a wide GH range.
Maintenance
Prune long leaves to maintain the desired height and encourage dense coverage. Thin the carpet periodically by removing and replanting runner plantlets so the patch stays even and does not shade itself out.
Common Challenges
- Leggy, stretched growth: too little light, raise the lighting to keep umbrellas compact.
- Slow spread: give it time to push runners and provide medium CO2 and a rich substrate.
- Patchy carpet: divide and replant runner plantlets to fill the gaps evenly.