Imperial Star
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Early green annual for summer harvests.
A green artichoke specifically bred for annual production, Imperial Star will produce well-developed artichokes the first year from seed. Plants become 1 1/2–3′ tall and have an open growth habit. Each typically produces 1–2 primary buds, which average 3–4″ in diameter, and 5–7 smaller secondary buds. Perennialization possible in Zone 9 and warmer; otherwise treat as an annual.
Specs:
- Packet: 25 seeds
- Avg. 10,500 seeds/lb
| Size | Packet, 100 Seeds, 250 Seeds, 1,000 Seeds, 5,000 Seeds |
|---|---|
| SCIENTIFIC NAME | Cynara cardunculus var. scolymus |
| CULTURE | Artichokes require very fertile, well-drained soils with a pH of 6.5–7.0. Sow artichokes indoors 8–12 weeks before transplant date. Plant 2–3 seeds, ¼" deep, per cell in 50-cell trays or individual containers. Germinate at 70–80°F (21–26°C) and grow at 60–70°F (15–21°C) day and 50–60°F (10–15°C) night. Thin to 1 plant per cell or container. Transplant 6- to 12-week-old plants to the field 2–3' apart in rows 3–6' apart. Protect from frost. |
| MILD AREAS | In Zone 9 and warmer, may be grown for annual or perennial production. |
| IMPORTANT COLD TREATMENT (VERNALIZATION) | Artichokes need 10 days of 45–50°F (7.2–10°C) temperatures to induce budding. In mild regions this can be accomplished naturally when overwintering a fall-planted crop. For spring-planted crops, cold exposure can occur in a refrigerator or cooler. Timing transplanting to expose seedlings to these temperatures is possible but may be unreliable. |
| HARVEST | Clip buds at desired size before bracts fully open. |
| SEED SPECS | SEEDS/LB.: Avg. 11,500. |
| DAYS TO MATURITY | From transplant. |
| PACKET | 25 seeds. |
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