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Tree Onion in the GardenTags plant encyclopedia

Allium x proliferum

 

Tree Onion

Tree onions, Allium × proliferum, are similar to onions (Allium cepa), but whereas an onion would have flowers, a tre onion would have a cluster of bulbils that will sprout and grow on the stalk, which may bend down under the weight of the new growth and take root some distance from the parent plant,- hence the "walking onion" name. The bulblets are usually between 0.5 cm to 3 cm in diameter.Many tree onions are very strong flavoured, although some cultivars are relatively mild and sweet. Young plants may be used as Spring Onions in the Spring, and the bulblets may be used in cooking similarly to regular onions, or preserved by pickling..

Contributed by @weekendwarrior

 
plant Features
  • Tree Onion likes full sun

    Full sun

  • Tree Onion likes occasional watering

    Occasional watering

  • Tree Onion is a little frost hardy: 32f (0°c)

    A little frost hardy: 32F (0°C)

  • Tree Onion likes moist and free draining

    Moist and free draining

 
plant information

Common name

Tree Onion

Latin name

Allium x proliferum

type

Perennial Vegetable

family

Amaryllidaceae

ph

7.0 - 8.5 Acid - Neutral

  • Light

    Tree Onion likes full sun

    Full sun

  • Frost

    Tree Onion is a little frost hardy: 32f (0°c)

    A little frost hardy: 32F (0°C)

  • Soil

    Tree Onion likes moist and free draining

    Moist and free draining

  • Water

    Tree Onion likes occasional watering

    Occasional watering

Plant & bloom calendar

  •  
    Best time to plant

full grown dimensions

The size of a fully grown Tree Onion is 0.10meters x 1.00meters 0.10 M 1.00 M

Allium x proliferum

Tree onions, Allium × proliferum, are similar to onions (Allium cepa), but whereas an onion would have flowers, a tre onion would have a cluster of bulbils that will sprout and grow on the stalk, which may bend down under the weight of the new growth and take root some distance from the parent plant,- hence the "walking onion" name. The bulblets are usually between 0.5 cm to 3 cm in diameter.Many tree onions are very strong flavoured, although some cultivars are relatively mild and sweet. Young plants may be used as Spring Onions in the Spring, and the bulblets may be used in cooking similarly to regular onions, or preserved by pickling..


Propagation by seed in Spring

From Early Spring TO Early Spring

Sow onion seed in prepared seed beds in early spring, in greenhouse borders, or in trays, ready to transplant to final positions in late spring.

 

Propagation by seed in late Summer

From Late Summer TO Early Autumn

For Japanese onions sow in final positions, in prepared beds, to establish themselves before the first frosts. Do not plant too early, because too much fresh growth will cause bolting (going to seed) next spring. Aim for not more than three true leaves before frosts.

 

Planting outdoors in Spring

From Mid Spring TO Late Spring

Plant out to final positions in mid to late spring 6" between plants in rows 12" to 15 " apart, in prepared ground, limed to keep soil neutral to alkaline

 
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