Cynara cardunculus Cardoon
cardoon
A robust herbaceous perennial to 2.5m forming a clump of silvery-grey, pinnatifid, spiny leaves up to 1m in length. Large thistle-like purple flowers in late summer and autumn
Size
Ultimate height
1.5–2.5 metresTime to ultimate height
2–5 yearsUltimate spread
1–1.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
Stem | Flower | Foliage | Fruit | |
Spring | Grey Silver | |||
---|---|---|---|---|
Summer | Purple | Grey Silver | ||
Autumn | Purple | Grey Silver | ||
Winter |
Position
- Full sun
Aspect
West–facing or East–facing or South–facing
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Asteraceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Columnar upright
- Genus
Cynara are robust thistle-like plants with grey-hairy, pinnately lobed leaves and globose purple flower-heads
- Name status
Correct
- Plant range
- Mediterranean
How to grow
Cultivation
Grow in a fertile, well-drained soil in full sun; shelter from strong winds. In very cold winters, apply a dry mulch
Propagation
Propagate by seed sown in pots in a cold frame or propagate by division in spring or take root cuttings in winter
Suggested planting locations and garden types
- Cottage and informal garden
- Wildlife gardens
- Architectural
- Cut flowers
- Flower borders and beds
Pruning
Cut down flower stems as they emerge in summer if you want to grow it as a foliage plant
Pests
Diseases
Generally disease-free
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.