Watsonia borbonica, commonly known as bugle lily, is a South African native that brings dramatic vertical interest to summer gardens with its tall spires of fragrant, rose-pink trumpet-shaped flowers. Hardy in zones 8 through 10, this iris family member grows 3 to 5 feet tall and produces showy blooms in June and July. A white-flowered form is also available for gardeners seeking variation. North of zone 8, it's grown as an annual, treated much like gladiolus, with corms dug and stored after the foliage dies back.
Full Sun
Moderate
8-10
60in H x 36in W
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Moderate
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The bugle lily's most striking feature is its towering flower spikes crowned with fragrant, deep rose-pink tubular blossoms that stretch to 2.5 inches long. Upright fans of sword-shaped, iris-like green leaves create an elegant architectural presence even before the flowers emerge. It performs reliably in full sun with moderate moisture and well-drained soil, tolerating a fairly wide range of soil types without fuss. The combination of vertical drama, fragrance, and low pest and disease pressure makes this a surprisingly easy large-scale accent for summer borders.
Watsonia serves as a bold ornamental accent in gardens, particularly valued for summer cutting garden displays where its tall, fragrant spikes bring architectural height and texture to arrangements. In warmer climates where it's reliably perennial, it anchors back borders and creates dramatic focal points. North of zone 8, gardeners treat it as a summer-blooming annual, similar to gladiolus, digging and storing corms each fall for spring replanting.
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In spring, once soil is workable and frost danger has passed, plant corms directly outdoors 3 to 4 inches deep and 6 inches apart in full sun with well-drained soil.
Plant corms directly in the garden in spring at a depth of 3 to 4 inches and spacing of 6 inches apart.
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“Watsonia borbonica hails from South Africa, where it evolved in the region's distinctive flora. The genus itself was named to honor Sir William Watson, cementing its place in botanical history. The plant was previously known as Watsonia pyramidata, a synonym that occasionally appears in older gardening literature. Its journey to Northern gardens reflects the 19th and early 20th century passion for South African bulbs among European horticulturists, eventually reaching American gardeners through nursery trade.”