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Butomus umbellatus (Flowering rush)

Other names: Grassy rush, Lily rush, Water gladiolus

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Species
B. umbellatus is a marginal or aquatic perennial with upright, twisted, mid-green leaves and spreading umbels of fragrant, cup-shaped, pink flowers in late summer.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
1.5 m 0.45 m 2-5 years
4 ft 1 ft 2-5 years

Where to grow

Soil type
  • Clay
  • Loamy
  • Sandy
Soil drainage
  • Boggy damp conditions
  • Pond/In water
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Full Sun
Aspect
  • West
  • South
Exposure
  • Exposed
  • Sheltered

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Additional plant details

Cultivation

Grow in full sun in fertile mud at the edge of a pond or in water up to 25cm deep. Alternatively, grow in a container and keep moist.

Suggested uses

Containers/Patio, Cottage/Informal, Wildlife, Waterside, Bog garden, Aquatic, Bees (attract & feed bees)

UK hardiness

H5

USDA zones

Zone 4, Zone 5, Zone 6, Zone 7, Zone 8, Zone 9, Zone 10

Sunset zone

WUCOLS

North-Central Coastal = Unknown
Central Valley = Unknown
South Coastal = Unknown
South Inland = Unknown
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Deciduous

Habit

Upright

Native to

Europe, Asia

Drought tolerant

No

Flood tolerant

Yes

Toxicity

Not toxic

Plant care

Pruning

Cut back after flowering. If grown in a container, divide every year to maintain vigour and flowering.

Propagation methods

Seed, Rhizome sections

Pests

Waterlily Pests (beetle, aphid, leaf-mining midges)

Diseases

Generally disease free.

Cut back after flowering in early autumn (optional)

Divide and replant in spring

Sow spores or seeds as soon as ripe on moist compost

Plant in water margin

Plant in moist or boggy soil

Plant container grown plants in a sunny postion

Other plants

Plants in this Genus (2)

Butomus

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Butomus umbellatus
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Butomus umbellatus Flowering rush
Butomus umbellatus f. albiflorus
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Butomus umbellatus f. albiflorus White flowering rush
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Companion plants (0)

Related content

Discuss Butomus umbellatus with other Shoot members

Butomus umbellatus

Shoot User
854 0
The name 'flowering-rush' is misleading, since this is not a member of the rush family, but a distant relative of water plantains and water soldier. It prefers nutrient-rich water, and is not uncommon in ponds, ditches and the edges of rivers where the water is not too fast-moving.
Posted: Thursday 21st of May 2009 07:33 PM Last reply: Sunday 17th of March 2024 11:17 AM
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