Blue false indigo
Baptisia australis
Hardiness: Zone 3, Zone 4, Zone 5, Zone 6, Zone 7, Zone 8, Zone 9
Plant type: Herbaceous Perennial
Height: 3'-5'
Spread: 2'-4'
Sun: Part Shade, Part Sun
Water: Low, Medium
Bloom time: May, June
Bloom color: Indigo blue
Soil: Clay-based, Acid (<7pH).