Allium unifolium One-leaved onion (Alliaceae)

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Allium unifolium
One-leaved onion
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The Allium unifolium plant species is found in Southwestern N. America. It is a member of the Alliaceae family. Common gardeners may know the plant as One-leaved onion. Some home gardeners know the variety as A. grandisceptrum.

Cultivation | Propagation | General Uses
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Latin Name:  Allium unifolium
Common Name:  One-leaved onion
Family:  Alliaceae
Author:  Kellogg.

Known Hazards:  Although no individual reports regarding this species have been seen, there have been cases of poisoning caused by the consumption, in very large quantities and by some mammals, of certain members of this genus. Dogs seem to be particularly susceptible[76].

Mature Height:  0.6   Mature Width:  0.1

Habitat:  Moist soils in pine or mixed evergreen forest in the coastal ranges of California[60, 90].

Cultivation Notes: Prefers a hot dry sunny position in a light, rich well-drained soil[90, 200]. This species is difficult to maintain under cultivation in Britain, our weather is probably too wet and cool for it to really thrive[142]. The plant has a summer resting period when it should be kept dry and so it is best grown in a cold greenhouse or bulb frame[203]. Placing a cloche over outdoor-grown plants in the summer, especially after flowering, will help to ripen the bulbs[142]. Most members of this genus are intolerant of competition from other growing plants[203]. This species is not fully hardy in Britain and is unlikely to survive in the colder parts of the country. It is only marginally hardy in N.W. England[203]. A new bulb is formed annually, the old one withering away[90]. Grows well with most plants, especially roses, carrots, beet and chamomile, but it inhibits the growth of legumes[18, 20, 54]. This plant is a bad companion for alfalfa, each species negatively affecting the other[201]. Members of this genus are rarely if ever troubled by browsing deer[233].

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Cultivation | Propagation | General Uses
Medicinal | Edible Uses

The information above has been supplied solely via the hard work and dedication of the team at 'Plants for a Future'.
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