Allium porrum 'Mammoth Pot Leek'
leek 'Mammoth Pot Leek'
A large, hardy perennial usually grown as an annual vegetable, with thick, semi-upright, mid-green leaves and short, blanched stems. Bred for exhibition purposes due to the heavy leeks it produces, but has a good flavour and tight flesh, making it a great addition to stews, soups and other culinary uses. Sow from January to April for harvesting from September to January
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
1 yearUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | Green | |||
| Winter | Green |
Position
- Full sun
- Partial shade
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H5Botanical details
- Family
- Amaryllidaceae
- Native to GB / Ireland
- No
- Foliage
- Evergreen
- Habit
- Columnar upright
- Genus
Allium are bulbous herbaceous perennials with a strong onion or garlic scent, linear, strap-shaped or cylindrical basal leaves and star-shaped or bell-shaped flowers in an umbel on a leafless stem
- Name status
Accepted
How to grow
Cultivation
Grow in moist but well-drained soil that is rich in organic matter, preferably in full sun though they will tolerate partial shade. For longer blanched stems, draw up soil around the stems in late summer and early autumn. See leek cultivation for further advice
Propagation
Propagate by seed. See sowing vegetable seeds
Suggested planting locations and garden types
Pruning
No pruning required
Pests
May be susceptible to slugs and snails, leek moth, onion fly, and onion thrips
Diseases
May be susceptible to leek rust, although this variety shows some resistance, onion white rot, downy mildews, foot and root rots, fungal leaf spots, and smuts
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