Blue False Indigo is a stunning native perennial that brings the deep indigo-blue blooms of traditional dye plants to the ornamental garden. Hardy from zones 3 through 3, this heirloom reaches 36 to 48 inches tall and wide, flowering generously from spring through summer with spikes of pea-like blooms that attract pollinators. Once established, it becomes remarkably drought tolerant and low maintenance, asking little more than full sun and well-drained soil to thrive for decades.
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Full Sun
Low
3-3
48in H x 48in W
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Moderate
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The flowers emerge in a rich indigo-blue that feels almost jewel-like against the plant's silvery-green foliage, blooming prolifically from March through August. Baptisia develops deep taproots that anchor it permanently in place, so after the first two to three years of establishment, you can largely forget about watering. Deer pass it by entirely, making it one of the few perennials that stays unmarred in wildlife-rich gardens, and it requires no staking, spraying, or fussing once it reaches maturity.
Blue False Indigo serves as a striking focal point in mixed borders, cottage gardens, and naturalized plantings. Its tall, columnar flower spikes add vertical structure and sculptural interest to garden compositions, and the seed pods that follow the blooms persist into fall, extending the plant's visual appeal. It works beautifully in cut arrangements when harvested at peak bloom.
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Scarify the seed and sow indoors 8 to 10 weeks before your last spring frost. Keep seeds at 35 to 40 degrees Fahrenheit for two weeks to break dormancy, then move them to approximately 70 degrees Fahrenheit for germination, which occurs in 21 to 28 days.
Transplant seedlings outdoors after hardening off, once soil has warmed and frost danger has passed.
Direct sow scarified seed in earliest spring or in fall for spring germination.
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