Also known as Gladdon · Gladdon Iris · Gladwyn
Safety note: This plant may be toxic to humans and pets. See toxicity details.
Stinking Iris (Iris foetidissima) is a hardy evergreen iris with dull green leaves and inconspicuous flowers, prized for its striking bright orange berries in autumn.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
50% intensity
Prefers sunny locations but tolerates partial shade well.
Moderate
50% intensity
Allow soil to dry slightly between waterings; reduce in winter.
Well-drained soil
50% intensity
Hardy
25% intensity
Tolerates a wide range of temperatures, including frost.
Low
25% intensity
Fertilize sparingly in spring; prefers poor to moderate soil.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 3/5 intensity |
| Toxic for pets | Yes 3/5 intensity |
| Edible | No |
Saponins and glycosides present in leaves and berries can cause gastrointestinal upset if ingested.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water moderately during the growing season, allowing the soil to dry slightly between waterings. Reduce watering in autumn and winter to prevent waterlogging.
Iris foetidissima is relatively drought-tolerant once established, but consistent moisture promotes better flowering and foliage health. Avoid overly wet conditions, especially in poorly drained soils.
Prune after flowering to remove spent flower stalks. Foliage can be left on for winter interest, as it often remains evergreen.
If the foliage becomes untidy or damaged, it can be trimmed back in late winter or early spring before new growth emerges. Remove any dead or diseased plant material promptly.
Propagate by division in early spring or autumn. Carefully lift the clumps and separate them into smaller sections, ensuring each section has healthy roots and shoots.
Alternatively, sow fresh seeds in autumn in a cold frame or unheated greenhouse. Germination can be erratic and may take up to two years.
Repot established plants every 3-4 years, or when they become overcrowded. The best time for repotting is in early spring as new growth begins. Use a well-draining potting mix.
Ensure the rhizomes are planted at the correct depth, with the top just at or slightly below the soil surface. Water thoroughly after repotting.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Stinking Iris (Iris foetidissima)
Where Stinking Iris (Iris foetidissima) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Asparagales |
| Family | Iridaceae |
| Genus | Iris |
| Species | Iris foetidissima |
Similar in genus Iris
Answers based on plant encyclopedia data
