Allium altissimum

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Early-flowering, deciduous, bulbous perennial producing short-lived, strap-shaped mid-green foliage and spherical heads of purple-pink flowers on straight stems to 1.1m tall. The foliage is often wilting and turning brown when the flowers appear, and for best visual effect the bulbs should be sited so that adjacent plants grow to conceal the leaves as they die back

Allium altissimum

Scientific classification

Species
Allium altissimum (Allium altissimum)
Genus
Allium
Family
Amaryllidaceae
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Toxicity
Bulbs
Plant type
1-1.5 metres
Height
0.1-0.5 metres
Spread
Deciduous
Foliage
Clump forming
Habit
Spring · Summer
Season of interest
Full sun
Sunlight
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Ideal temperature

Allium altissimum pictures

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Distribution of Allium altissimum

Distribution map

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Culture

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Toxicity

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Quick identification of Allium altissimum

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Allium altissimum care guide

Regular watering spring growth, reduce irrigation autumn leaf dieback
Watering
Full sun
Sunlight
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Ideal temperature

Watering

Regular watering spring growth, reduce irrigation autumn leaf dieback

Fertilizing

Weak bulb liquid feed applied once before spring leaf emergence phase

Pruning

No pruning required, other than to remove old flowered stems and foliage

Propagation

Propagate by seed, sowing in containers in a cold frame when just ripe or in the spring and by offsets which can be carefully detached by lifting the bulb after flowering has finished. See bulb propagation

Growing

Easy to grow in full sun and a fertile well-drained soil. It is best to grow in containers where garden soil is heavy clay and prone to saturation over winter. See allium cultivation

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Common pests and diseases

Diseases

May be susceptible to onion white rot, and onion downy mildew

Pests

May be susceptible to slugs, snails and allium leaf miner

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