Prairie-turnip (Psoralea esculenta)
Other names Large Indian Breadroot, Breadroot
At a glance
- Lifecycle
- Perennial (hardy)
- Exposure
- Full sun
- Frost limit
- −34.4 °C
Cultivation
Succeeds in an ordinary garden soil. Plants are very intolerant of root disturbance, they are best planted out into their permanent positions whilst still small. This plant has been recommended for improvement through breeding and selection for its edible root. This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby.
Propagation
Pre-soak the seed for 24 hours in warm water and then sow in early to mid spring in a greenhouse. Either sow the seed in individual pots or pot up the young seedlings as soon as possible in order to avoid root disturbance. Grow them on in the pots until planting out in their final positions. It is usually impossible to transplant this species without fatal damage to the root. Division in spring. With great care since the plant resents root disturbance. It is virtually impossible to divide this species successfully.
Edible uses
Root - raw or cooked.
Medicinal uses
An infusion of the dried roots has been used in the treatment of gastro-enteritis, sore throats and chest problems.
Material uses
The plant is a good soil stabilizer in its natural environment.
Habitat
Rocky woods and prairies, on calcareous soils.
Native range
N. America - Manitoba to North Dakota and Wisconsin, south to Missouri and Texas.