Blue Wild Indigo

Baptisia australis

Also called Purple Baptisia

Hills guide picknative · Central Texassold locallytoxic

Blue Wild Indigo is a shrub native to Central Texas that grows 5 ft tall and 3 ft wide. It wants full sun and low to medium water, and handles clay soil. Blooms blue and purple in Apr–Jul. Deer rarely browse it. Good for bees, butterflies, caterpillars and hummingbirds.

Toxic — pets, livestock. Quinolizidine alkaloids in seeds and foliage.

Will it grow in your yard?

Enter your ZIP. The finder checks Blue Wild Indigo against your microclimate, then ranks it against your sun, your watering and deer pressure.

From our guide

Village of the Hills

Upright perennial with blue-green foliage, spikes of indigo pea flowers in spring and inflated black seedpods.

Why it works here

Deep taproot makes it essentially permanent and drought-proof once established. Nitrogen fixer.

Watch out

Takes three years to look like anything — do not judge it early. Resents transplanting once settled.

The facts

9 sources

Type: Shrub
Sun: Full sun (6+ hrs)
Water: Low to medium
Height: 5 ft
Spread: 3 ft
Bloom: Apr–Jul · blue, purple
Foliage: Deciduous
Soil: Takes clay · recorded on clay, dry, loam, moist, sand
Deer: High — deer rarely browse it. Alkaloids make it unpalatable. Reliably left alone.
Wildlife: Supports bees, butterflies, caterpillars and hummingbirds

Size, sun, water and foliage from the Village of the Hills guide; the rest resolved across sources.

Where it grows

Recorded in this EPA Level IV ecoregion in the Austin and Hill Country launch area:

Northern Blackland Prairie

1 occurrence record in Central Texas (GBIF).

Can you buy it?

Sold at local nurseries. Confirmed in stock at a Central Texas grower in these sizes:

2.5–4.5 inch pots1 gallon

From the growers we read so far — a short list, not the whole trade. Call ahead.