Allium × proliferum
Layered onion
Common names: Air onion, Egyptian onion
Photo: Kurt Stüber [1] · CC BY-SA 3.0 · Source
This description was machine-translated.
Description
The layered onion is a hardy perennial that produces small bulbils in airy tiers above the stem instead of flowers, hence its name. These bulbils can be harvested or replanted, so no seed sowing is required. It provides flavorful onion greens almost year‑round and is extremely winter hardy.
Care instructions
Plant the airy bulbils in late summer or autumn in a sunny spot; they will root over winter. Leave some stems with bulbils standing so they will self‑multiply. Harvest the tubular leaves continuously from May onward and split overcrowded clumps every few years in spring.
Soil & site
Soil pH
Soil type
humus-rich, well-drained, loamy, lime-loving
Feeding
Light feeder
Companion planting
Good neighbors
carrot family (Apiaceae)
Umbellifers and alliums confuse each other's pests (carrot fly, onion fly).
For example celery rootDillParsleyCarrot fennelCorianderCelery (Stalk Celery) and 18 more species in the catalogue
Source: classic companion planting (DACH-Gartenpraxis)
rose family (Rosaceae)
You can plant garlic and chives under strawberries and roses; their scent repels aphids and other pests.
For example AppleRaspberryClimbing rosePearAroniaBlackberry and 52 more species in the catalogue
Source: Bio-Gärtnerei Mixed Culture Practice
Rather not
legume family (Fabaceae)
particularly well establishedAllium species inhibit the nitrogen‑fixing rhizobia of legumes through their root exudates, which slows their growth.
For example Pole beanBroad beanMarker peaSugar peaRed beanLima bean and 29 more species in the catalogue
Source: basic crop‑rotation rule
nightshade family (Solanaceae)
Onions slow down the growth of nightshade family plants next to potatoes and tomatoes; the classic crop-rotation rule also applies in the bed side by side.
For example PotatoTomatoSweet pepperCocktail tomatoEggplantCape gooseberry and 9 more species in the catalogue
Source: basic crop-rotation rule
Companion planting is partly traditional gardening lore. Where the reason is known, it is given.
Some of these explanations were machine-translated.
Diseases & pests
1 relevantFrom the knowledge base, automatically linked by affected species. How to spot and prevent them is covered in full in the lexicon.
Delia antiqua
The onion fly (Delia antiqua) lays its eggs on the leaf sheaths of young onion plants, and the larvae then tunnel into the bulb, the neck and the roots.
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