Caltha palustris var. palustris 'Plena' (d)
swamp marsh marigold 'Plena'
A vigorous marginal aquatic perennial, to 60cm tall, with creeping rhizomes and rounded, deep green leaves. Fully-double, deep yellow flowers, up to 8cm across, are produced on branched, upright stems in spring
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Size
Ultimate height
0.5–1 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Poorly–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Yellow | Green | ||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | Green | |||
| Winter |
Position
- Full sun
Aspect
West–facing or South–facing or East–facing
Exposure
Exposed or Sheltered Hardiness
H7Botanical details
- Family
- Ranunculaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- Potentially harmful
- Leaves are poisonous if ingested. Wear gloves and wash hands after handling
- Genus
Caltha are rhizomatous herbaceous perennials with simple, usually heart-shaped leaves and cup-shaped yellow or white flowers in early spring
- Name status
Accepted
How to grow
Cultivation
Grow in an open site in rich boggy soil at the water's edge in full sun. See pond plants and bog gardens for further advice
Propagation
Propagate by division in late summer or early spring
Suggested planting locations and garden types
- Cottage and informal garden
- Wildlife gardens
Pruning
Cut back after flowering
Pests
Generally pest-free
Diseases
Powdery mildews may be a problem
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