How to grow globe artichoke
Cynara cardunculus var. scolymus · Asteraceae · Vegetable
When to plant artichokes: the short answer
Start seeds indoors about 10 weeks before your last spring frost; plant out about 1 week before it. Seeds germinate in soil from 60 to 85°F, fastest near 75°F.
Zone 5: plant out Apr 16 – May 3. Zone 7: plant out Mar 22 – Apr 8. Zone 9: plant out Feb 6 – Feb 23. See every zone.
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
Growth stages: how long artichokes take to grow
From seed to first harvest takes roughly 21-25 weeks: about 9 weeks as a seedling indoors, then 85-110 days in the garden. It is a perennial, so once established it comes back and crops year after year.
When to plant globe artichoke
When to plant artichokes by USDA zone
Dates worked out from each zone’s typical frost dates for 2026. Find your zone on the zone map, or pick your state below for dates from its own frost dates. Zones 11 and above are frost-free, so timing there depends on heat and rain instead.
| Zone | Last / first frost | Start indoors | Sow or plant out |
|---|---|---|---|
| Zone 3 | May 15 / Sep 15 | - | May 1 – May 18 |
| Zone 4 | May 10 / Sep 25 | - | Apr 26 – May 13 |
| Zone 5 | Apr 30 / Oct 5 | - | Apr 16 – May 3 |
| Zone 6 | Apr 15 / Oct 15 | - | Apr 1 – Apr 18 |
| Zone 7 | Apr 5 / Oct 25 | - | Mar 22 – Apr 8 |
| Zone 8 | Mar 20 / Nov 5 | - | Mar 6 – Mar 23 |
| Zone 9 | Feb 20 / Nov 30 | - | Feb 6 – Feb 23 |
| Zone 10 | Jan 30 / Dec 15 | - | Jan 16 – Feb 2 |
Companions
Sunflower, Pea
No strong antagonists recorded.
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.
Questions gardeners ask
When should I plant artichokes?
Start seeds indoors about 10 weeks before your last spring frost; plant out about 1 week before it. Seeds germinate in soil from 60 to 85°F. The table on this page gives dates for each USDA zone, and the planting calendar gives dates for your own state or ZIP code.
How long do artichokes take to grow?
About 85-110 days from transplanting to the first harvest, or roughly 21-25 weeks from sowing the seed indoors. Seeds germinate in 10-21 days.
How much sun do artichokes need?
They need at least six to eight hours of direct sun a day.
What soil pH do artichokes need?
A soil pH between 6.5 and 8.0. It tolerates neutral to slightly alkaline soil better than most vegetables. Test before adding lime or sulfur - see the soil pH and testing guide.
How far apart should I plant artichokes?
Space plants about 36 inches apart in rows 48 inches apart, or one plant per 4 square feet in a square-foot bed. Sow seeds about ¼ inch deep.
Can I grow artichokes in a container?
Yes. Use a container at least 24 inches deep with drainage holes and a good potting mix, and water more often than you would in the ground.
Figures are typical home-garden ranges from Cooperative Extension planting guides, cross-checked against multiple state sources. Your variety and conditions will vary.