Prairie Onion, Autumn onion
Allium stellatum
Family: Alliaceae
What it is like
Bloom Color: Pink. Main Bloom Time: Early fall, Late summer, Late fall, Mid summer, Mid fall. Form: Upright or erect.
Allium stellatum is a BULB growing to 0.8 m (2ft 7in) at a medium rate. See above for USDA hardiness. It is hardy to UK zone 6 and is not frost tender. It is in flower in July. 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): 0.8
Where it is found
Rocky prairies, slopes, shores and ridges. Usually found on limestone soils.
N. America - Illinois and Minnesota to Missouri, Nebraska and Kansas.
Conservation Status:
Countries/locations it is found in
How it is used
Food
Rating: 3
Bulb - raw or cooked. The bulbs are eaten by the N. American Indians. They are rather small, about 4cm tall and 15mm wide. Leaves - raw or cooked. Flowers - raw. Used as a garnish on salads.
Root: includes bulbs, corms, tubers, rhizomes etc.
Medicine
Rating: 2
A sweetened decoction of the root has been taken, mainly by children, as a remedy for colds. 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.
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
Landscape Uses:Border, Container, Massing, Rock garden. An easily grown plant, it prefers a sunny position in a rich moist but well-drained soil. The bulbs should be planted fairly deeply. Most members of this genus are intolerant of competition from other growing plants. There is at least one named variety - 'Album' has white flowers. 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. Closely allied to A. cernuum and to A. textile. Members of this genus are rarely if ever troubled by browsing deer. Special Features: North American native, Suitable for cut flowers.
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. Very easy, the plants divide successfully at any time in the growing season and the divisions can be planted straight out into their permanent positions if required.
Best place to grow: Cultivated Beds;
Habit: Bulb
Hardiness: 5-9
Growth: Medium
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 very large quantities and by some mammals, of certain members of this genus. Dogs seem to be particularly susceptible.