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Northwest Blooms · Perennials

Baptisia Australis

Blue False Indigo

Baptisia Australis
Family
Fabaceae
Height
36 to 48 inches
Width
36 to 48 inches
Flower color
Indigo-blue
Foliage color
Blue-green
Bloom time
April to May
Light
Full sun; tolerates light shade
Water
Drought-tolerant once established
Maintenance
Low; prune after flowering if seed pods are not desired
Growing zone
USDA zones 3 to 9
Wildlife
Attracts butterflies; deer and rabbit resistant

About this plant

Baptisia australis, commonly known as blue false indigo, is a perennial native to central and eastern North America. It blooms from late spring to early summer, producing tall spires of deep blue to violet pea-like flowers that add bold color to the garden. As the blooms fade, they give way to dark, inflated seed pods that rattle in the wind, adding late-season interest.

Baptisia australis forms a dense, shrub-like habit over time, with foliage that emerges a soft blue-green and matures to a dusky green, creating an elegant backdrop for its vivid blooms. The plant's long taproot allows it to be incredibly drought-tolerant once established, and its roots have historically been used by Indigenous peoples to create a blue dye, giving the plant its "false indigo" name.

Works well in

Borders · Sun Gardens · Pollinator Gardens · Waterwise Gardens · Cut Flower Gardens

Companion plants

Peonies · Coneflowers · Salvias · Shasta daisies · Asters · Catmint

Design tip

Foliage and form do most of the work here, so lean on texture and repetition rather than one flowering moment. Give it open sun and room to fill out, and repeat it in threes or fives so the planting reads as one sweep instead of scattered dots.

Where to see it

This plant can be seen at the Center for Urban Horticulture.