Hottonia palustris

RHS Plant Profile

water violet

RHS 2002

Other common names

featherfoil, water featherfoil, water gilliflower, water milfoil, fioled y dŵr

Aquatic

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An aquatic perennial with whorled, feathery submerged leaves and pale purple flowers held above the water in late spring

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.5-1 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Clay Loam Sand

Moisture: Poorly–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Primulaceae
Native to GB/Ireland: Yes
Foliage: Deciduous
Habit: Submerged
Genus: Hottonia are submerged aquatic perennials with finely pinnatisect leaves and erect stems bearing whorls of primula-like, lilac or white flowers in a terminal racemes
Name Status: Correct

How to Grow

Cultivation

Plant directly in the margins, or in baskets in a pool of clear, still or very slow moving water in full sun. Mature plants can grow in up to 60cm of water. A good oxygenator. See pond plants for further advice

Propagation

Propagate by division in spring or by seed; plants sometimes produce resting buds that sink to the bottom to overwinter, then produce new growth in spring

Suggested planting locations and garden types

Wildlife gardens
Low Maintenance

Pruning

No pruning required

Pests

May be susceptible to flase leaf-mining midge. Filamentous algae may smother foliage

Diseases

Generally disease-free