Aspen Onion, Twincrest onion
Allium bisceptrum
Family: Alliaceae
What it is like
Allium bisceptrum is a BULB growing to 0.3 m (1ft). See above for USDA hardiness. It is hardy to UK zone 8. It is in flower from July to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, insects. Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers moist soil.
Height (m): 0.3
Where it is found
Meadows and aspen groves, occasionally on open slopes
Western N. America - Oregon to California.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 3
Bulb - raw or cooked. They were usually harvested in spring or early summer. The bulbs are 10 - 15mm wide. Leaves - raw or cooked. Used as a relish. Flowers - raw. Used as a garnish on salads. The seed heads can be placed in hot ashes for a few minutes, then the seeds extracted and eaten.
Root: includes bulbs, corms, tubers, rhizomes etc.
Seed: includes nuts, cereals, peas and beans.
Medicine
Rating: 2
The plant juice has been used as an appetite restorer. Although no other specific mention of medicinal uses has been seen for this species, members of this genus are in general very healthy additions to the diet. They contain sulphur compounds (which give them their onion flavour) and when added to the diet on a regular basis they help reduce blood cholesterol levels, act as a tonic to the digestive system and also tonify the circulatory system.
Appetizer: Improves the appetite
Other
Rating:
The juice of the plant is used as a moth repellent. The whole plant is said to repel insects and moles.
Repellent: Plants that are said to deter but not necessarily kill various mammals, birds, insects etc.
How it is grown
Prefers a sunny position in a light well-drained soil. This species is only hardy in the milder areas of the country, it should tolerate temperatures down to between -5 and -10°c. The bulbs should be planted fairly deeply. Most members of this genus are intolerant of competition from other growing plants. Grows well with most plants, especially roses, carrots, beet and chamomile, but it inhibits the growth of legumes. This plant is a bad companion for alfalfa, each species negatively affecting the other. Members of this genus are rarely if ever troubled by browsing deer.
Propagating it: Seed - sow spring in a cold frame. Prick out the seedlings into individual pots when they are large enough to handle - if you want to produce clumps more quickly then put three plants in each pot. Grow them on in the greenhouse for at least their first winter and plant them out into their permanent positions in spring once they are growing vigorously and are large enough. Division in spring. The plants divide successfully at any time in the growing season, pot up the divisions in a cold frame or greenhouse until they are growing well and then plant them out into their permanent positions.
Best place to grow: Cultivated Beds;
Habit: Bulb
Hardiness: 7-10
Growth:
Soil: Light (sandy), medium
Shade: No shade
Moisture: Moist
Things to keep in mind
Although no individual reports regarding this species have been seen, there have been cases of poisoning caused by the consumption, in large quantities and by some mammals, of certain members of this genus. Dogs seem to be particularly susceptible.