Overview
Thapsia is a plant with a perennial habit in the genus Thapsia, part of the Apiaceae family, with pinnate foliage. Thapsia grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H4. Suggested uses include ornamental.
About
Thapsia, commonly known as deadly carrot, is a perennial plant in the Apiaceae family. It features pinnate foliage and thrives best in full sun, ideally in a south-facing, sheltered position. This cultivar prefers fertile, well-drained loam soil with a neutral pH. Hardy to UK zone H4, it is suitable for ornamental use and is most notable during spring and summer. Propagation is typically by seed.
Growing conditions
Best soil and position for Thapsia
- Sunlight
- Full sun
- Soil type
- Loam
- Soil pH
- Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing
- Exposure
- Sheltered
- UK hardiness
- H4
Plant details
Thapsia size, habit and characteristics
- Habit
- Perennial
- Foliage
- Pinnate
- Suggested uses
- Ornamental
Care notes
Pruning and caring for Thapsia
- Propagation
- Seed
- Pest resistance
- High
- Disease resistance
- High
Frequently asked questions
Where is the best place to plant Thapsia?
Thapsia prefers full sun. It suits sheltered positions.
What soil does Thapsia need?
Thapsia grows best in loam soil. It prefers neutral soil. Aim for soil that stays well-drained.
Is Thapsia hardy in the UK?
Thapsia has an RHS hardiness rating of H4, meaning it is hardy through an average UK winter, tolerating -10 to -5°C.
How do I propagate Thapsia?
Seed.