Hosta 'Blue Mammoth' (_sieboldiana_)
plantain lily 'Blue Mammoth'
A large, clump-forming deciduous perennial to 1m high, with thick, broadly heart-shaped, pale blue-green leaves. Produces clusters of white and pale purple flowers held on stems above the foliage in summer
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Size
Ultimate height
0.5–1 metresTime to ultimate height
2–5 yearsUltimate spread
1–1.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Blue Green | |||
|---|---|---|---|---|
| Summer | Purple White | Blue Green | ||
| Autumn | Blue Green | |||
| Winter |
Position
- Full shade
- Partial shade
Aspect
East–facing or North–facing or West–facing
Exposure
Sheltered Hardiness
H7Botanical details
- Family
- Asparagaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- Genus
Hosta are clump-forming herbaceous perennials with simple, ovate or lance-shaped leaves, often attractively coloured or variegated, and erect racemes of nodding, funnel or bell-shaped flowers in early summer
- Name status
Accepted
How to grow
Cultivation
Grow in a shady spot in fertile soil that does not dry out, with shelter from cold, drying winds. Mulch annually in spring. Hostas in the ground may need watering during dry spells. See hosta cultivation for more detailed advice
Propagation
Propagate by division in early spring or late summer
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Flower borders and beds
Pruning
No pruning required
Pests
Diseases
May be susceptible to virus diseases
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