Blue false indigo has upright blue flower spikes and a substantial clump of foliage that remains attractive after flowering.
- Height
- 91–122 cm / 3–4 ft
- Spread
- 60–122 cm / 2–4 ft
- Light
- Full sun / Partial shade
- Soil moisture
- Dry
- Flowering
- Spring, Summer
- Maintenance
- Low
- USDA zones
- 3a–9b
Planting
Give it full sun for the best flowering and average, well-drained soil. Place it where its broad mature clump can remain, since the deep taproot makes transplanting difficult.
Care
Trim after flowering if you want a neater shape or do not want seed pods. Leave the pods in place if their later-season structure is part of the planting.
Before planting: All parts are toxic if swallowed in quantity; consider access by children and pets when choosing a site.
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Sources & photo credit
Plant reference: NC State Extension Gardener Plant Toolbox. Content checked . Flowering seasons vary with local climate; USDA zones describe winter cold tolerance.
- Blue false indigo: Phyzome · CC BY-SA 3.0. Resized, converted to WebP and cropped for display.
- White false indigo: bebet2006 · CC BY 2.0. Resized, converted to WebP and cropped for display.
- 'Dilys' geranium: Krzysztof Golik · CC BY-SA 4.0. Resized, converted to WebP and cropped for display.
- Adam's needle yucca: Carl Lewis · CC BY 2.0. Resized, converted to WebP and cropped for display.