Wild blue indigo functions as a native nitrogen fixer in our Asian pear tree guild. A fast growing perennial that offers early flowers and shelter for pollinators, it’s inedible to humans and deer alike, making a good barrier or screening plant from spring through fall.
Common Name: Wild Blue Indigo, Blue False Indigo
Scientific Name: Baptisia australis
- Nitrogen fixing
- Source of blue dye
Forest Garden Designing
- Plant Type: Medium herbaceous perennial
- Plant Leaf Type: Deciduous
- Layer Use: Herbaceous
- Pollination: Self-fertile
- Flowering: Blue flowers from late spring to early summer
- Leaf Shape: Trifoliate, arranged alternately along the stems; slender oblong to almost rounded oval
- Height: 2-4′
- Width: 2-5′
- USDA Hardiness Zone: 4-8
- Light: Full-part sun
- Shade: Tolerates moderate shade
- Moisture: Dry to moist soils; will not tolerate waterlogged locations
- pH: Neutral to slightly acidic
- Juglone tolerance: Known to be affected by juglone
Easy to propagate from cuttings; seeds can be scarified to improve germination.
Extremely hardy. Drought tolerant. Too much moisture can result in fungal problems.