How to grow globe artichoke

Cynara cardunculus var. scolymus · Asteraceae · Vegetable

Globe Artichoke is a cool-season vegetable in the Asteraceae family, usually started indoors and set out as transplants. It wants full sun (six or more hours of direct light) and consistent moisture — it resents drying out. From sowing to first pick is about 85–110 days. It shrugs off a light frost but a hard freeze will damage it.

Grower’s note: A tender perennial where winters are mild (Zone 7+), grown as an annual elsewhere: start early and give seedlings about two weeks of cool weather (below 50 F) so they bud the first year. 'Imperial Star' and 'Colorado Star' are bred for annual growing.

Sowing

Sow about 0.25″ deep, into soil between 60–85°F — germination is quickest near 75°F. It is slow and often erratic to germinate (10–21 days). For an early crop, start seed indoors about 10 weeks before your last spring frost and grow it under bright light.

Spacing & layout

Give each plant about 36″ along the row with roughly 48″ between rows. On a square-foot grid that is one plant per 4 square feet. Allow at least 24″ of loose, workable soil for the roots. It grows well in containers at least 24″ deep.

Fitting it to your season

Globe Artichoke is a perennial: you plant it once and it comes back and crops for years, so it does not fit the annual sow-and-harvest cycle. Give it a permanent, well-prepared spot out of the way of yearly digging. It takes one to three seasons to reach a full harvest — take little or nothing the first year while the plant establishes.

Quick facts

When to plant globe artichoke

Companions

Common problems

Pests: aphids, artichoke plume moth, slugs.

Diseases & disorders: botrytis, powdery mildew, verticillium wilt.

Same family (Asteraceae)

Rotate these so they don’t follow each other in the same bed year to year.

Figures are typical home-garden ranges from Cooperative Extension planting guides, cross-checked against multiple state sources. Your variety and conditions will vary.