Allium hyalinum
Glassy onion
Allium Allium
A. hyalinum - A. hyalinum is a compact, clump-forming, bulbous perennial with linear, mid to light green leaves and, in spring, umbels of glossy, white to pale pink flowers turning transparent with age.
Allium hyalinum is: Deciduous
Scented leaves
Erect, Clump-forming
Pale-pink, White in Spring
Green in Spring; Green in Winter
Leaf-mining sawflies Leaf-mining sawflies
Onion rot , Powdery mildew Onion rot , Powdery mildew
Deadhead to prevent self-seeding. Do not remove leaves until they have completely died down.
Sow seed in a cold frame in autumn. Self-seeds readily in ideal growing conditions. Separate bulbs in autumn.
Offsets, Seed
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Allium hyalinum (Glassy onion) will reach a height of 0.3m and a spread of 0.9m after 2-5 years.
Beds and borders, Bees (attract & feed bees), Cottage/Informal, Gravel, Rock
Grow in fertile, well-drained or moist but well-drained soil in full sun or partial shade. Where native, grows in heavy clay and rocky outcrops in sun or shade. Plant in autumn 5-10cm deep. Best with plenty of water from winter into spring. Keep dry in summer when dormant.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Well-drained
Acid, Alkaline, Neutral
Partial Shade, Full Sun
South, West
Exposed, Sheltered
Hardy (H4)
Allium hyalinum
Glassy onion
Allium Allium
A. hyalinum - A. hyalinum is a compact, clump-forming, bulbous perennial with linear, mid to light green leaves and, in spring, umbels of glossy, white to pale pink flowers turning transparent with age.
California
Deciduous
Scented leaves
Erect, Clump-forming
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Pale-pink, White in Spring
Green in Spring; Green in Winter
Deadhead to prevent self-seeding. Do not remove leaves until they have completely died down.
Sow seed in a cold frame in autumn. Self-seeds readily in ideal growing conditions. Separate bulbs in autumn.
Offsets, Seed
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Allium hyalinum (Glassy onion) will reach a height of 0.3m and a spread of 0.9m after 2-5 years.
Beds and borders, Bees (attract & feed bees), Cottage/Informal, Gravel, Rock
Grow in fertile, well-drained or moist but well-drained soil in full sun or partial shade. Where native, grows in heavy clay and rocky outcrops in sun or shade. Plant in autumn 5-10cm deep. Best with plenty of water from winter into spring. Keep dry in summer when dormant.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Well-drained
Acid, Alkaline, Neutral
Partial Shade, Full Sun
South, West
Exposed, Sheltered
Hardy (H4)
Zone 8, Zone 7, Zone 6, Zone 5
Allium hyalinum (Glassy onion)
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 hyalinum (Glassy onion)
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 hyalinum (Glassy onion)
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/
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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: | Partial Shade, Full Sun | Tell us... |
Aspect: | South, West | Tell us... |
Exposure: | Exposed, Sheltered | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
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