Artichoke (Colorado Star)
perennial
- 2026 · Bed E
- Spacing
- 36 in
- Trellis
- no
- Seed indoor
- Jan 21(-12 w)
- Transplant
- Apr 15(at frost)
- Harvest
- ~20–28 weeks from sowing
- Water
- 1-2 per week
- Seed shelf life
- 5–6 y
- Lifecycle
- perennial
- Seed source
- Johnny's Selected Seeds
Imperial Star and Colorado Star are bred for first-year production from seed. Needs ~10 days of 45-50°F to trigger budding — happens naturally in a cool Zone 7 spring, or chill seedlings in the fridge for 10 days before planting out. Plant 1 per 9 sqft (3 ft spacing). Perennial in mild climates, treated as annual where winter lows go below ~14°F.