Cardinal larkspur is a striking perennial native to the chaparral slopes of coastal southern California and northern Baja California, prized for its luminous scarlet-red flowers that rise on tall, upright spikes from late spring through midsummer. Growing 3 to 6 feet tall depending on conditions, this herbaceous beauty attracts hummingbirds with magnetic intensity while remaining completely deer-resistant. Hardy in zones 7 through 10, it thrives in well-draining, rocky soils and actually prefers dry conditions once established, making it surprisingly low-maintenance once you understand its summer dormancy needs.
Partial Sun
Moderate
7-10
72in H x 24in W
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Moderate
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The bright red, inch-wide blooms appear on upright flower spikes that can tower up to 6 feet tall, creating a stunning vertical accent in the garden. Hummingbirds are irresistibly drawn to the brilliant scarlet flowers, transforming your garden into a living migration station during peak bloom. Unlike many delphiniums, cardinal larkspur tolerates dry, shallow, rocky soils and actually needs less water than you'd expect, especially during its critical summer dormant period when it demands a dry rest to thrive.
Cardinal larkspur is primarily used to naturalize gardens, especially in dry climate zones and coastal regions where its native habitat can be recreated. Its tall, showy flower spikes make it valuable in cottage gardens, native plant gardens, and xeriscaping projects where dramatic vertical color is desired without the water demands of traditional delphinium varieties.
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“Delphinium cardinale is native to the dry chaparral slopes stretching from coastal southern California down to northern Baja California, where it evolved to withstand the region's hot, arid conditions. This wild perennial has maintained its ecological niche across these coastal and inland deserts for centuries, and its introduction to cultivation reflects the growing appreciation for California native plants that can handle both beauty and drought.”