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Clintonia uniflora (Queen Cup)

Bride's Bonnet, Queen Cup, Bead Lily, Blue-Bead Lily, Blue Bead, Beadlily, Clintonia, One-Flowered Clintonia, Queencup Beadlily, Single-Flowered clintonia, Smilacina borealis var. uniflora

Clintonia uniflora, Bride's Bonnet, Queen Cup, Bead Lily, Smilacina borealis var. uniflora, White flowers, shade perennials
Clintonia uniflora, Bride's Bonnet, Queen Cup, Bead Lily, Smilacina borealis var. uniflora, White flowers, shade perennials

Carpeting the forest floor, Clintonia uniflora (Queen Cup) is a charming woodland perennial forming a basal clump of 2-3 fleshy, oblong, glossy green leaves, up to 6 in. long (15 cm). From late spring to mid-summer, a leafless flowering stalk rises well above the basal rosette. It bears one or two star-like white flowers with bright yellow stamens. Each blossom is followed by an exquisite amethyst-blue berry in late summer. The berries are relished by ruffled grouse. Lovely in groups under trees, in cool, moist, shady locations where it will happily multiply to form an attractive ground cover. This North American species can live for 30 or more years.

  • Grows in clumps up to 6-10 in. tall and wide (15-25 cm). This understory plant has slender rhizomes that spread gradually, forming large, long-lived colonies over time.
  • Easily grown in organically rich, moist, well-drained soils in part shade or full shade.
  • Great for shade gardens, woodland gardens, underplanting shrubs or roses, bogs, or along ponds and streams.
  • No serious pest or disease issues. Keep an eye out for slugs and snails.
  • Propagate by root divisions taken in spring or by seed. Seedlings will take up to 4 years to flower.
  • Native to western North America.

Requirements

Hardiness 4 - 8
Heat Zones 1 - 8
Plant Type Perennials
Plant Family Liliaceae
Exposure Partial Sun, Shade
Season of Interest Spring (Late)
Summer (Early, Mid, Late)
Fall
Height 6" - 10"
(15cm - 25cm)
Spread 6" - 10"
(15cm - 25cm)
Spacing 12" (30cm)
Maintenance Low
Water Needs Average
Soil Type Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy, Fruit & Berries
Native Plants United States, Alaska, Rocky Mountains, Pacific Northwest, California, Washington, Idaho, Oregon, Montana
Tolerance Full Shade
Attracts Birds
Garden Uses Ground Covers, Ponds And Streams, Underplanting Roses And Shrubs
Garden Styles Informal and Cottage, Prairie and Meadow
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Recommended Companion Plants

Thuja plicata Fluffy® (Western Arborvitae)
Abies lasiocarpa ‘Green Globe’ (Alpine Fir)
Chamaecyparis nootkatensis ‘Glauca’ (Nootka Cypress)
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While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 4 - 8
Heat Zones 1 - 8
Plant Type Perennials
Plant Family Liliaceae
Exposure Partial Sun, Shade
Season of Interest Spring (Late)
Summer (Early, Mid, Late)
Fall
Height 6" - 10"
(15cm - 25cm)
Spread 6" - 10"
(15cm - 25cm)
Spacing 12" (30cm)
Maintenance Low
Water Needs Average
Soil Type Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy, Fruit & Berries
Native Plants United States, Alaska, Rocky Mountains, Pacific Northwest, California, Washington, Idaho, Oregon, Montana
Tolerance Full Shade
Attracts Birds
Garden Uses Ground Covers, Ponds And Streams, Underplanting Roses And Shrubs
Garden Styles Informal and Cottage, Prairie and Meadow
How Many Plants
Do I Need?

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