Allium caeruleum
Azure-flowered garlic, Blue-flowered garlic, Allium azureum , Allium 'Azureum', Allium caeruleum azureum, Allium coerulescens, Blue of the heavens, Blue globe onion
Allium Allium
A. caeruleum - A. caeruleum is a clump-forming, bulbous perennial with linear, grey-green leaves and erect stems bearing compact, dense, rounded clusters of blue flowers in early summer.
Allium caeruleum is: Deciduous
Scented leaves
Clump-forming, Erect flower stem
RHS AGM (Award of Garden Merit)
Blue in Summer
Grey-green in Spring; Grey-green in Summer
Slugs Slugs
Onion rot Onion rot
Cut back leaves only when they have completely died down.
Seed, Offsets
Sign up for your FREE ACCOUNT today or login to receive detailed monthly care instructions
Allium caeruleum (Azure-flowered garlic) will reach a height of 1m and a spread of 0.1m after 2-5 years.
Architectural, Cottage/Informal, Flower Arranging, Beds and borders, Underplanting
Grow best in fertile, well-drained soil in full sun. Add grit to clay soils prior to planting to improve drainage. Leaves may die back before or during flowering.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Well-drained
Acid, Alkaline, Neutral
Full Sun
North, South, East, West
Sheltered
Hardy (H4)
Allium caeruleum
Azure-flowered garlic, Blue-flowered garlic, Allium azureum , Allium 'Azureum', Allium caeruleum azureum, Allium coerulescens, Blue of the heavens, Blue globe onion
Allium Allium
A. caeruleum - A. caeruleum is a clump-forming, bulbous perennial with linear, grey-green leaves and erect stems bearing compact, dense, rounded clusters of blue flowers in early summer.
Deciduous
Scented leaves
Clump-forming, Erect flower stem
RHS AGM (Award of Garden Merit)
Create your free SHOOT garden and make a record of the plants in your garden.
Add your own photos, notes, get monthly email reminders on how to care for your plants, and connect with other gardeners. Get started now.
Blue in Summer
Grey-green in Spring; Grey-green in Summer
Cut back leaves only when they have completely died down.
Seed, Offsets
Create a free SHOOT account and get instant access to expert care advice for this and other plants in your garden.
You'll also receive handy monthly email reminders of what needs doing. Create your free account.
Allium caeruleum (Azure-flowered garlic) will reach a height of 1m and a spread of 0.1m after 2-5 years.
Architectural, Cottage/Informal, Flower Arranging, Beds and borders, Underplanting
Grow best in fertile, well-drained soil in full sun. Add grit to clay soils prior to planting to improve drainage. Leaves may die back before or during flowering.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Well-drained
Acid, Alkaline, Neutral
Full Sun
North, South, East, West
Sheltered
Hardy (H4)
Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3
Allium caeruleum (Azure-flowered garlic)
allium leaf miner
Phytomyza gymnostoma
Insect
Present (Limited)
3
3
Pest of Allium already present in UK and spreading; previous consultation supported awareness raising only; industry should prepare for the event of findings in commercial crops.
Allium caeruleum (Azure-flowered garlic)
Asain cotton leafworm; Cluster caterpillar; Fall armyworm; Rice cutworm; Taro caterpiller; Tobacco budworm; Tobacco caterpillar; Tobacco cutworm; Tobacco leaf caterpillar
Spodoptera litura
Insect
Absent
3
3
Regulated pest; frequently intercepted with occasional outbreaks which have been successfully eradicated in the UK.
Allium caeruleum (Azure-flowered garlic)
Nematode; common spiral; Spiral nematode; Steiners spiral nematode
Helicotylenchus dihystera
Nematode
Absent
2
3
Nematode pest unlikely to be very damaging in its own right; but used as a an indicator species to assess compliance of soil requirements of imported plants to be kept under review in light of EFSA evaluation of soil requirements.
Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.
Traveling or importing plants? Please read "Don't risk it" advice here
Suspected outbreak? Click here for contact details to report to the relevant authority.
Date updated: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/
In order to add a note on this plant, please add this plant to your plant lists.
This plant likes... | Garden match | |
Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
Soil pH: | Acid, Alkaline, Neutral | Tell us... |
Light: | Full Sun | Tell us... |
Aspect: | North, South, East, West | Tell us... |
Exposure: | Sheltered | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
Morris & Co., the British heritage brand founded by William Morris in 1861, will stage its first Show Garden at RHS Chelsea 2022, designed by award-winning landscape and garden designer Ruth… read more
To add ? to your lists,
login to your account or subscribe.
Find out more about plant lists here
or Login
To add notes for this plant login to your account or register for a new account.
Sign up for freeor Login
To add images for this plant login to your account or register for a new account.
Sign up for freeor Login
To check if this plant is suitable for your garden first login to your account or subscribe.
or Login