Water Violet care guide
Water Violet (Hottonia palustris) — medium light, 10-24 °C, pH 6-7.5, no CO2.
Compiled by Aquairi from published sources · Published · Updated
Overview
Water Violet (Hottonia palustris) is an aquatic plant of the family Primulaceae, 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. A beautiful European native with feathery, finely dissected leaves arranged in dense whorls. Tolerates cold water well and is suitable for unheated aquariums. Produces attractive white to pale violet flowers above the water surface when grown emersed.
Taxonomy
- Family: Primulaceae
- Genus: Hottonia
- Scientific name: Hottonia palustris
- Common synonyms: Featherfoil, Hottonia palustris
Habitat
Hottonia palustris (Primulaceae) is a European water plant of clean, cool, still or slow-flowing waters with finely divided submersed leaves and emergent flower spikes. It is rare in much of its range due to habitat loss. In the Aquairi knowledge base, populations associated with this form are recorded from Europe.
Growth requirements
- Lighting: medium
- CO2: not required
- Temperature: 10-24 °C (50-75 °F)
- pH: 6-7.5
- GH: 3-12 °dGH
- Substrate: nutrient-rich aquasoil
- Maximum height: 40 cm
- Growth rate: medium
- Recommended placement: background
Placement
Background stem; tolerates cooler water than most aquarium plants and is often grown in cold-water layouts and unheated tanks. In the Aquairi knowledge base this form is recommended for the background under medium light and without obligatory CO2 injection, using nutrient-rich aquasoil.
Propagation
Propagated by cuttings; horizontal stems also produce side shoots that can be separated and replanted. Documented propagation techniques for this entry include: stem cuttings.
Common issues
Sensitive to high water temperature and to elevated nutrient levels; cool, clean water supports the most vigorous submersed growth.
Propagating Hottonia palustris (Water Violet) from Cuttings
Overview
Hottonia palustris, the water violet or featherfoil, is a European and northern Asian native of bogs and marshes. Its submerged stems reach up to about 80 cm and carry deeply divided, feathery leaves arranged in regular whorls, resembling the teeth of a double comb. Basal roots anchor in the mud while silvery roots dangle freely in the water. The species name palustris is Latin for "of the marsh."
It tolerates cool water well and suits unheated or cool aquariums, though it also adapts to tropical tanks. Cuttings are the straightforward way to multiply healthy stems.
Propagation Method (Cuttings)
Like other stem plants, water violet is propagated by topping: cut the top few centimetres of a stem and plant it directly into the substrate, where new buds and roots develop from the internodes. The parent stem continues to grow from below, so each cut yields both a new plant and a regrowing base.
Step-by-Step
- Choose a strong stem with dense, healthy whorls of feathery leaves.
- Cut the top 5-10 cm with clean, sharp scissors.
- Remove the leaves from the lowest 2-3 cm of the cutting.
- Insert the bare stem into a good substrate so it anchors.
- Give it bright light and, ideally, additional CO2 to speed establishment.
- Leave the parent base to regrow new shoots.
Conditions for Healthy Growth
Water violet performs noticeably better in cooler water; growth can take off within days when temperatures drop a few degrees from the high tropical range toward the mid-20s C or lower. It benefits from good substrate, strong light and added CO2. Acclimate emersed-grown plants slowly to submerged life, and keep nutrients steady to support the dense, bushy whorls.
Trimming & Maintenance
When a stem starts looking ratty, you can tuck a midpoint of a longer stem back into the substrate without cutting it, leaving a horizontal section running across the substrate with the top still poking up. This encourages bushy new growth along the whole stem rather than just from the tips, keeping the plant full.
Common Challenges
The main difficulty is warm water, in which water violet often struggles, thins out and can seem to disappear. Poor acclimation of emersed stock, weak light and low nutrients also lead to decline. Keeping the tank cool, lit and well fed is the surest route to dense, healthy whorls.