Stream Orchid (Epipactis gigantea)

Stream Orchid

Epipactis gigantea

Tall, delicate blooms rise from wetland edges, a soft splash of pink in damp habitats. Perennial terrestrial orchid; common names: Stream Orchid, Giant Helleborine.

Partial sun
3–4/week
Moderate
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Plant Needs

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Sunlight Partial shade to dappled sunlight; tolerates full sun in cool, consistently wet climates
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Watering Keep soil consistently moist; avoid drying out completely during active growth
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Temperature Hardy to 0°C; avoid prolonged temperatures above 28°C to prevent heat stress
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Characteristics

  • Leaf: Lanceolate, bright green, alternate along stem, up to 15 cm long
  • Flower: Pink to purplish-brown, hooded lip, clustered in terminal racemes
  • Stem: Erect, smooth green stem with sheathing leaf bases
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Care Guide

Watering

Keep substrate saturated but not waterlogged to mimic natural bog habitat

Fertilization

Diluted balanced orchid fertilizer every 2 weeks. Cease fertilizing in autumn when above-ground growth slows

Banana peel compost tea:Fully compost banana peels, dilute 1:20 with water, and apply as a root drench to support flower development
Pruning
  • Remove spent flower spikes at the base after blooming to redirect energy to root growth
  • Trim yellowing or damaged leaves at the stem base to prevent fungal spread
  • Thin overcrowded clumps in early spring to improve air circulation and reduce competition
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No known toxicity to cats

Humans: No known toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental wetland garden plant; occasional cut flower