Butomus umbellatus 'Rosenrot'

RHS Plant Profile

flowering rush 'Rosenrot'

Aquatic Bogs Herbaceous Perennial

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A deciduous, rush-like, marginal aquatic perennial, with narrow, twisted green leaves. Umbels of cup-shaped, mid- to deep pink, fragrant flowers are held above the foliage on upright, red-tinted stems up to 1m tall in summer

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 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

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Butomaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Submerged
Genus: Butomus are submerged rhizomatous perennials with narrowly strap-shaped leaves and 6-petalled pink flowers held in umbels well above water level
Name Status: Accepted

How to Grow

Cultivation

Grow in fertile mud at pond margins or in water up to 25cm deep, in full sun. See pond plants and bog gardens for further advice

Propagation

Propagate by seed sown as soon as ripe or by rhizome division in spring. See pond plants propagation for further advice

Suggested planting locations and garden types

Cottage and informal garden

Pruning

Cut back after flowering

Pests

May be susceptible to water lily aphid

Diseases

Generally disease-free