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Pontederia cordata

pickerel weed

A marginal aquatic perennial to 1.2m, forming a clump of erect, lance-shaped or ovate, bright green leaves to 18cm in length, with dense erect spikes, to 15cm in length, of small tubular deep blue flowers in late summer

Other common names
heart-leaved pickerel weed
wampee
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Size
Ultimate height
1–1.5 metres
Time to ultimate height
5–10 years
Ultimate spread
0.5–1 metres
Growing conditions
Clay
Loam
Moisture
±Ê´Ç´Ç°ù±ô²â–d°ù²¹¾±²Ô±ð»å
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Blue Green
Autumn Green
Winter
Position
  • Full sun
Aspect

South–facing or °Â±ð²õ³Ù–f²¹³¦¾±²Ô²µ

Exposure
Exposed or Sheltered
Hardiness
H5
Botanical details
Family
Pontederiaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Genus

Pontederia are herbaceous perennials from marginal aquatic habitats, forming clumps of erect, linear or lance-shaped leaves, with 2-lipped blue flowers in dense terminal spikes in late summer and early autumn

Name status

Correct

Plant range
Eastern N America to Caribbean

How to grow

Cultivation

Grow in baskets of fertile loam, in shallow water (10-12cm deep) and in full sun. See pond plants and bog gardens for further advice

Propagation

Propagate by division in spring as growth starts or propagate by seed sown in containers as soon as ripe

Suggested planting locations and garden types
  • Low Maintenance
Pruning

Cut back after flowering

Pests

Generally pest-free

Diseases

Generally disease-free

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