Alphabetical Plant Listing

Epipactis gigantea (Giant Helleborine)

Giant Helleborine, Stream Orchid, Chatterbox Orchid, Giant Hellebore


Epipactis gigantea (Giant Helleborine) is a terrestrial orchid with loose spikes of up to 32 showy flowers, 1 in. across (3 cm), spread out along the stem. The sepals are green or greenish, with petals ranging from greenish to pink to rose, often with purple-brown or red markings or veins. Blooming for several weeks from mid spring to mid summer, the flowers are borne on erect stems bearing mid-green, lance-shaped leaves. They bloom in sequence up the stem. Approximately two months after flowering, the foliage fades, then disappear completely with the arrival of winter. The root system forms a dense spreading clump of rhizomes. Giant Helleborine will spread over time. Native to western North America, Giant Helleborine grows naturally in wet areas in a variety of habitats, including riverbanks, hot springs, and meadows. Ideal for a rock or woodland garden or in a wildflower meadow.

  • Grows up to 12-30 in. tall (30-75 cm) and 6 in. wide (15 cm).
  • Performs best in moist, humus-rich, leafy soil in partial shade.
  • A lovely addition to beds and borders, cottage gardens, woodland gardens, rock gardens, bog gardens, near ponds and streams. Can be grown in containers too.
  • Virtually pest and disease free. Deer resistant
  • Propagate by division in spring.
  • Native to western North America from western Canada to central Mexico. This is one of the most abundant orchids of the Pacific coast of North America.

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Requirements

Hardiness 5 – 10
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Orchids, Perennials
Plant Family Epipactis - Helleborines
Exposure Partial Sun
Season of Interest Spring (Mid,Late)
Summer (Early,Mid)
Height 1' – 3' (30cm – 90cm)
Spread 4" – 6" (10cm – 15cm)
Spacing 6" (15cm)
Water Needs High
Maintenance Low
Soil Type Chalk, Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Poorly Drained
Characteristics Showy
Native Plants United States, California, Midwest, South Dakota, Pacific Northwest, Idaho, Oregon, Washington, Rocky Mountains, Colorado, Montana, Utah, Wyoming, Southwest, Nevada, Arizona, New Mexico, Oklahoma, Texas
Tolerance Deer
Garden Uses Beds and Borders, Bog Gardens, Patio and Containers, Ponds and Streams
Garden Styles Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

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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.


Requirements

Hardiness 5 – 10
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Orchids, Perennials
Plant Family Epipactis - Helleborines
Exposure Partial Sun
Season of Interest Spring (Mid,Late)
Summer (Early,Mid)
Height 1' – 3' (30cm – 90cm)
Spread 4" – 6" (10cm – 15cm)
Spacing 6" (15cm)
Water Needs High
Maintenance Low
Soil Type Chalk, Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Poorly Drained
Characteristics Showy
Native Plants United States, California, Midwest, South Dakota, Pacific Northwest, Idaho, Oregon, Washington, Rocky Mountains, Colorado, Montana, Utah, Wyoming, Southwest, Nevada, Arizona, New Mexico, Oklahoma, Texas
Tolerance Deer
Garden Uses Beds and Borders, Bog Gardens, Patio and Containers, Ponds and Streams
Garden Styles Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

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