New! Early purple variety for late summer to midfall harvest.
2 1/2-3' tall plants produce 3-4 primary buds that are 3-4" in diameter, followed by 8-10 secondary buds that are 1 1/2-2 3/4" in diameter. Opera has an upright plant habit and is one week earlier than Tempo, which it replaces. Avg. 15,000 seeds/lb. Packet: 10 seeds.
Plant Cycle: (A) Days to Maturity or Bloom: 100
Seed Crop Failure
See #66 as a substitute
Disease Resistance:
No disease information found.
Growing Information:
Artichoke, Globe
CULTURE: Sow indoors about 8-12 weeks before last spring frost date. Sow 1/4" apart and 1/4" deep in lightly moistened soilless mix in a flat or pot. As soon as seedlings can be handled, transplant to 2-4" pots or cell-type containers and grow at 60-70°F (15-21°C) day and 50-60°F (10-15°C) night. Transplant 6-8 week old plants to the field 2-3' apart. Perennial to Zone 7; otherwise, treat as an annual.
IMPORTANT COLD TREATMENT (VERNALIZATION): Time transplanting so plants get 8-10 days of 50°F (10°C) temperatures to induce earlier budding. Protect from frost.
HARVEST: Clip mature buds midsummer to midfall, depending on location.
MILD AREAS: Where winter low is above 14°F (-10°C), sow seeds in fall, harvest in spring.
MATURITY: From transplant; add about 20 days if direct seeding.
SEED SPECS: SEEDS/LB.: Avg. 9,750.
PACKET: 25 seeds unless otherwise noted.
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