Allium caeruleum syn. Allium azureum, Allium caeruleum azureum, Allium coerulescens
Allium (Species) Azure-flowered Garlic
A. caeruleum is a bulbous perennial up to 80cm in height, with narrow leaves often withering by flowering time. Starry blue flowers are borne in compact, rounded clusters in early summer. Allium plants chosen for garden cultivation have terminal umbels of brightly coloured flowers, are hardy and easy to grow. The foliage varies from the rolled-round leaves of garden onions and chives to the broad, oval leaves of wild garlic. Most species have a typical onion smell. Alliums do best in well drained soil, open to the sun. Some dwarf species can be grown as pot plants if kept in a cold greenhouse or frame until nearly in flower.
Contributed by @carolecuttingitfine
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Full sun
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Occasional watering
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Full Frost Hardy: 5F (-15°C)
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Free draining and fertile
Common name
Allium (Species) Azure-flowered Garlic
Latin name
Allium caeruleum syn. Allium azureum, Allium caeruleum azureum, Allium coerulescens
type
Bulb
family
Amaryllidaceae
ph
5.0 - 7.0 Acid - Neutral
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Light
Full sun
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Frost
Full Frost Hardy: 5F (-15°C)
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Soil
Free draining and fertile
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Water
Occasional watering
Plant & bloom calendar
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Best time to plant
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When the plant will bloom
full grown dimensions
0.40 M
0.40 M
Allium caeruleum syn. Allium azureum, Allium caeruleum azureum, Allium coerulescens
A. caeruleum is a bulbous perennial up to 80cm in height, with narrow leaves often withering by flowering time. Starry blue flowers are borne in compact, rounded clusters in early summer. Allium plants chosen for garden cultivation have terminal umbels of brightly coloured flowers, are hardy and easy to grow. The foliage varies from the rolled-round leaves of garden onions and chives to the broad, oval leaves of wild garlic. Most species have a typical onion smell. Alliums do best in well drained soil, open to the sun. Some dwarf species can be grown as pot plants if kept in a cold greenhouse or frame until nearly in flower.
Planting
From Early Autumn TO Mid Autumn
Alliums do best in well drained soil in full sun. Plant smaller types among alpine plants, the others, between low growing shrubs or herbaceous plants. Plant in mid to late autumn covering the bulbs to 3 or 4 times their own depth and leave untouched for several years until the clumps are so thick that flowering is stifled, and then divide the clumps.
Flowering Season
From Early Summer TO Mid Summer
Most allium varieties flower from early to mid-summer.
Propagation by division.
From Early Spring TO Late Autumn
Species which multiply rapidly can be split in the autumn or as growth starts in the spring.. Replant both spring and autumn-divided plants immediately and keep the soil moist.
Propagating by offsets
From Early Autumn TO Mid Autumn
Alliums very often produce off-sets - little immature bulbs at the side of the bulb. In Autumn the bulb can be lifted and the offsets gently removed and replanted.
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