Vegetable · Perennial vegetable
Cardoon
Cynara cardunculusA dramatic, silvery thistle relative of the globe artichoke, grown for its thick, celery-like leaf stalks rather than a flower bud. It needs a long, steady season to bulk up before the stalks are blanched and cut. The one rule: give it deep, rich soil and plenty of room to spread.
Sow depth
¼ in
Spacing
2.5 ft · rows 4 ft
Sun
Full sun
Germination
10–14 days
Time to harvest
120–150 days
Difficulty
Moderate
When to sow cardoon
- Sow from around your last expected frost until about 3 weeks after your last expected frost.
Start indoors — sow into deep pots 6–8 weeks before the last frost.Germinate at a warm 21–26°C and keep the mix moist until seedlings emerge.Harden off and transplant once frost risk has passed, spacing plants wide.
Feed and water generously — cardoon is a hungry, thirsty plant that never stops growing.Mulch well to conserve moisture through the long growing season.Stake tall stalks in exposed spots so wind does not topple the crown.
Blanch stalks first — bundle the leaves and wrap in cardboard or black plastic 3–4 weeks before cutting.Cut stalks at the base once they have paled and softened from blanching.A light frost sweetens the flavor, but harvest before a hard freeze.
Companion plants
Tall, sun-loving companions like sunflowers give cardoon a little afternoon shade without competing for its wide root run.
Watch out for
Aphids — Cluster on tender young leaves and stems. Hose off with water or encourage ladybirds early in the season.Slugs and snails — Shelter in the dense leaf bases of young plants. Keep the crown clear of mulch and hand-pick at dusk.