Water
Water moderately during the active growing season, ensuring the soil dries out between waterings. Reduce watering significantly in winter. Avoid waterlogged conditions, which can lead to root rot.
Spiny thistle Onopordum horridum is a large, spiny biennial plant native to the Mediterranean region, known for its imposing stature and formidable defense.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers at least 6-8 hours of direct sunlight daily.
Moderate
50% intensity
Allow soil to dry slightly between waterings.
Well-drained soil is essential. Prefers sandy or loamy soils and tolerates poor, dry conditions.
50% intensity
Moderate
60% intensity
Ideal growing range is 15-25 °C.
Outdoor
50% intensity
Light
30% intensity
Feed sparingly in spring with a balanced fertilizer.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water moderately during the active growing season, ensuring the soil dries out between waterings. Reduce watering significantly in winter. Avoid waterlogged conditions, which can lead to root rot.
Pruning is typically minimal, mainly for removing dead or damaged foliage. Cut back spent flower stalks to prevent self-seeding if desired. Wear protective gloves due to sharp spines.
Propagated by seed, sown in early spring or autumn. Can also be propagated by root cuttings, though this is less common. Ensure seeds are sown in well-draining soil.
As a biennial, it is not typically repotted. If grown in a container for overwintering, ensure adequate space for root development and protect from extreme cold.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Onopordum Horridum (Onopordum horridum)
Where Onopordum Horridum (Onopordum horridum) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Onopordum |
| Species | Onopordum horridum |
Similar in genus Onopordum
Answers based on plant encyclopedia data
