Package of Johnny's Selected Seeds
Package of Johnny's Selected Seeds

Disease Resistance:

No disease information found.

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Use for cut flowers and bouquets

Use for cut flowers and bouquets

Good variety to choose for fresh cut Flowers displays.

Opera (F1)
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Opera (F1)

2231

Product ID: 2231

Purple annual for late summer to mid-fall harvest.

Purple artichoke specifically bred for annual production from seed. The 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 replaced. Perennial in Zone 7 and warmer; otherwise treat as an annual. Avg. 15,000 seeds/lb. Packet: 10 seeds.

Product Price Qty
2231Packet  $9.95 
223150 Seeds  $43.65 
2231100 Seeds  $80.80 
2231250 Seeds  $157.60 
2231500 Seeds  $303.85 
Backordered until 08/29/14
22311,000 Seeds  $592.25 
Backordered until 08/29/14
22315,000 Seeds  $2,621.35 
Backordered until 08/29/14

Quick Facts

Days to Maturity or Bloom:   100

Plant Cycle:   (A)  

Product Symbols:

Use for cut flowers and bouquets  

Shipping Information & Notes

Globe Artichokes | Growing Instructions

Growing Information

Artichoke and Cardoon



CULTURE: Artichokes and Cardoon require very fertile, well-drained soils in a pH range of 6.5-8.0. Sow Artichokes indoors 8-12 weeks before last spring frost date. Cardoon is more vigorous and can be started later, 6-8 weeks prior to last frost date. Sow 1/4" apart and 1/4" deep in 20-row or open flats. Germinate at 70-80°F (21-26°C). As soon as seedlings can be handled, transplant to 4" pots or 1½" cell-type containers and grow at 60-70°F (15-21°C) day and 50-60°F (10-15°C) night. Transplant 6- to 12-week-old plants to the field 2-3' apart in rows 4-6' apart. Perennial to Zone 6, otherwise, treat as an annual. See specific requirements for each species below.
GLOBE ARTICHOKES:
IMPORTANT COLD TREATMENT (VERNALIZATION): Time transplanting so plants receive 10 days of 45-50°F (7.2-10°C) temperatures to induce earlier budding. Protect from frost.
HARVEST: Clip mature buds mid-summer to mid-fall, depending on location.
MILD AREAS: Where winter low is above 14°F (-10°C), sow seeds in fall, harvest in spring.
SEED SPECS: SEEDS/LB.: Avg. 9,650.
CARDOON:
BLANCHING: Gather stalks in late summer or early fall, tie upright with twine, and wrap with black plastic or black and white newspaper to exclude sunlight. Blanching is done for 3-4 weeks during the cooler weather of early fall.
HARVEST: Harvest after blanching, cutting at the base of the stalks to keep intact.
SEED SPECS: SEEDS/LB.: Avg. 12,350.
PACKET: 25 seeds unless otherwise noted.


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