Allium cepa Proliferum Group
Tree onion, Egyptian onion, Walking onion, Topsetting onion, Allium cepa var. proliferum, Allium x proliferum, Allium cepa 'Proliferum'
Allium Allium
Proliferum Group _ Proliferum Group is a perennial cultivated as an annual vegetable with upright, strap-like, dark grey-green leaves and clusters of small, edible bulbs forming at the top of the stems, typically ready for harvest in late summer.
Allium cepa Proliferum Group is: Deciduous
Upright
Can be toxic if consumed in large quantities. Toxic to mammals, particularly dogs.
Dark-green in Spring; Dark-green in Summer; Dark-green in Winter
Purported to be immune to onion fly. Highly attractive to slugs.
Leek moth , Eelworm (stem and bulb) , Slugs Leek moth , Eelworm (stem and bulb) , Slugs
Good tolerance to mildew.
Bolting , Bull neck , Neck rot , Rust , Saddleback , Shanking , Smut , White rot , White tip Bolting , Bull neck , Neck rot , Rust , Saddleback , Shanking , Smut , White rot , White tip
Harvest in late summer. Replant immediately or store in a cool, dry, frost-free place and plant out in late winter or early spring. Divide bulbs after leaves die back in late summer.
Typically grown from sets, which are quick maturing, adaptable, and less prone to mildew and onion fly. If growing from seed, sow seed in rows from late winter to mid-spring. Think out weak seedlings.
Seed, Sets
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Allium cepa Proliferum Group (Tree onion) will reach a height of 1.2m and a spread of 0.5m after 1-2 years.
Add to salads, Beds and borders, Flavouring food and drinks
Plant sets 10cm apart in rows 30cm apart in autumn. Push fairly deep into the soil, deeper than other edible onion sets. Water in dry periods. Stop watering when onions are swollen. Best to rotate site annually. Avoid planting near alfalfa.
Loamy, Sandy
Well-drained
Alkaline, Neutral
Full Sun
South, West
Sheltered
Tender in frost (H3)
We do not currently have companion plants added for this plant.
Allium cepa Proliferum Group
Tree onion, Egyptian onion, Walking onion, Topsetting onion, Allium cepa var. proliferum, Allium x proliferum, Allium cepa 'Proliferum'
Allium Allium
Proliferum Group _ Proliferum Group is a perennial cultivated as an annual vegetable with upright, strap-like, dark grey-green leaves and clusters of small, edible bulbs forming at the top of the stems, typically ready for harvest in late summer.
Deciduous
Upright
Can be toxic if consumed in large quantities. Toxic to mammals, particularly dogs.
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Dark-green in Spring; Dark-green in Summer; Dark-green in Winter
Purported to be immune to onion fly. Highly attractive to slugs.
Leek moth , Eelworm (stem and bulb) , Slugs
Good tolerance to mildew.
Bolting , Bull neck , Neck rot , Rust , Saddleback , Shanking , Smut , White rot , White tip
Harvest in late summer. Replant immediately or store in a cool, dry, frost-free place and plant out in late winter or early spring. Divide bulbs after leaves die back in late summer.
Typically grown from sets, which are quick maturing, adaptable, and less prone to mildew and onion fly. If growing from seed, sow seed in rows from late winter to mid-spring. Think out weak seedlings.
Seed, Sets
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Allium cepa Proliferum Group (Tree onion) will reach a height of 1.2m and a spread of 0.5m after 1-2 years.
Add to salads, Beds and borders, Flavouring food and drinks
Plant sets 10cm apart in rows 30cm apart in autumn. Push fairly deep into the soil, deeper than other edible onion sets. Water in dry periods. Stop watering when onions are swollen. Best to rotate site annually. Avoid planting near alfalfa.
Loamy, Sandy
Well-drained
Alkaline, Neutral
Full Sun
South, West
Sheltered
Tender in frost (H3)
Allium cepa Proliferum Group (Tree 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 cepa Proliferum Group (Tree 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 cepa Proliferum Group (Tree onion)
American serpentine leaf miner; chrysanthemum leaf miner
Liriomyza trifolii
Insect
Absent
2
3
Regulated pest already subject to review at the EU level (2013). Regularly intercepted in the trade.
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: | Loamy, Sandy | Tell us... |
Soil drainage: | Well-drained | Tell us... |
Soil pH: | Alkaline, Neutral | Tell us... |
Light: | Full Sun | Tell us... |
Aspect: | South, West | Tell us... |
Exposure: | Sheltered | Tell us... |
Hardiness: | Tender in frost (H3) | Tell us... |
Designed by Helen J Rosevear and Jane Stoneham. This accessible, sensory-rich family garden promotes the Year of Green Action 2019. read more
Inspired by the new, exciting Witan Investment Trust PLC Global Growth Garden project at RHS Hyde Hall (opening Spring 2017), this garden seeks to demonstrate the fabulous selection of edible plants… read more
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