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BogsHerbaceous Perennial

Oenanthe aquatica
  • RHS Plants for pollinators

fine-leaved water dropwort

An extremely poisonous, perennial plant, either floating or terrestrial, about 1-1.5m tall, with small mid-green leaves in fan-shaped segments. Small 5-petaled white flowers bloom in compound umbels, from early summer to early autumn

Synonyms
Oenanthe phellandrium
Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.5–1 metres
Growing conditions
Clay
Loam
Moisture
Poorly–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer White Green
Autumn White Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Sheltered
Hardiness
H7
Botanical details
Family
Apiaceae
Native to GB / Ireland
Yes
Foliage
Deciduous or Semi evergreen
Habit
Clump forming, Floating
Potentially harmful
TOXIC if eaten. Wear gloves and other protective equipment when handling TOXIC to pets if eaten (dogs) - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus

Oenanthe are perennials with a preference for damp ground, marshes or water. Hollow stems are shiny and can grow up to 2m tall. Leaves are triangular, shiny and bright green and flowers are arranged in small white clusters. Brown, rugby-shaped seeds follow the flowers.

Name status

Correct

How to grow

Cultivation

Grows naturally in damp meadows and near ditches and ponds and has the potential to become a nuisance if left unchecked. For a list of alterntive plant to use in ponds and streams, please go to our advice profile on bog gardens and pond plants

Propagation

Propagate by division in late spring

Suggested planting locations and garden types
  • Wildlife gardens
Pruning

No pruning required

Pests

Generally pest-free, but may be susceptible to slugs and snails

Diseases

Generally disease-free

Get involved

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