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Baptisia australis
Also called Blue false indigo, Baptisia, Streamside Blue Indigo, Tall Wild Blue Indigo, Wild False Indigo
Blue wild indigo is a clump-forming, deep-rooted perennial legume native to central and eastern North America, valued for its blue to violet spring flower spikes. It is best grown in full sun, in well-drained soil, and it is drought tolerant once established.
Baptisia australis, commonly known as blue wild indigo or blue false indigo, is a flowering plant in the family Fabaceae (legumes). It is a perennial herb native to much of central and eastern North America and is particularly common in the Midwest, but it has also been introduced well beyond its natural range. Naturally it can be found growing wild at the borders of woods, along streams or in open meadows. It often has difficulty seeding itself in its native areas due to parasitic weevils that enter the seed pods, making the number of viable seeds very low. The plant has low toxicity levels for humans.
Baptisia australis is the most commonly cultivated species in its genus, and is also cultivated beyond its native continent in other areas such as Great Britain, where it has gained the Royal Horticultural Society's Award of Garden Merit. It is considered to be a desirable plant in the garden due to its deep blue to violet spring flowers, the attractive light green compound leaves, and also for the somewhat unusual oblong fruits that emerge in the late summer. In a garden setting Baptisa australis can get aggressive and require regular pruning.
Baptisia australis grows best in lime-free, well-drained stony soil in full sun to part shade. It grows to about 90 to 120 cm (3.0 to 3.9 ft) tall in height with a similar spread. Like other members of the genus, it has a very deep taproot, which makes it quite difficult to move once planted. It thrives in full sun and requires water only in times of low rainfall. One slightly negative feature it that the leaves tend to drop early in the fall, but this may be avoided by cutting the dead stems as they die back.
Young shoots of the plant have been mistaken for asparagus, which resulted in poisoning. The seeds may be toxic, especially for children.
Text excerpted from the Wikipedia article Baptisia australis by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
