Stinking Iris (Iris foetidissima)

Stinking Iris

Iris foetidissima

Its evergreen foliage stays vibrant year-round; a tough, low-maintenance garden staple. Evergreen perennial herb; common names: Stinking Iris, Gladwin Iris.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Thrives in bright partial sun to full shade; tolerates dense woodland shade and urban pollution
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Watering Water deeply when the top 5cm of soil dries out; drought-tolerant once established, with no need for frequent watering
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Temperature Hardy to -10°C, tolerates mild frost and cool temperate summers; avoid prolonged exposure to temperatures above 28°C
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Characteristics

  • Leaf: Sword-shaped, dark green evergreen blades that emit a faint unpleasant scent when crushed
  • Flower: Pale violet to creamy white blooms with yellow markings on the lower falls
  • Fruit: Ovoid green capsules that split in autumn to reveal bright orange-red, long-lasting seeds
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Care Guide

Watering

Keep soil evenly moist but not waterlogged to support active growth

Fertilization

Apply a light, balanced organic feed once at the start of growth. Over-fertilization can lead to weak foliage and reduced flowering

Banana peel tea:Soak 1 fully ripe banana peel in 1L of water for 24 hours, dilute the mixture 1:2 with fresh water, and drench the root zone to support seed head development
Pruning
  • Remove spent flower stems immediately after blooming to redirect energy to foliage and root growth
  • Trim dead or damaged foliage in early spring to make space for new shoots
  • Thin overcrowded clumps every 3-4 years in early spring to maintain air circulation and vigor
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion leads to vomiting, diarrhea, abdominal pain, and lethargy

Humans: Ingestion causes mild oral irritation and nausea; contact may trigger mild skin dermatitis in sensitive individuals

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental foliage and bright red seed heads for winter garden interest; limited historical medicinal uses for digestive complaints