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

Disease Resistance:

No disease information found.

Symbols Explained

Use for cut flowers and bouquets

Use for cut flowers and bouquets

Good variety to choose for fresh cut Flowers displays.

Opera (F1)

Opera (F1)


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, upright plants produce 1-3 primary buds, which average 3-4" in diameter, followed by 8-10 secondary buds that are 1 1/2- 2 3/4" in diameter. Perennial in Zone 7 and warmer; otherwise treat as an annual. Utility patent granted.
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 
22311,000 Seeds  $592.25 
22315,000 Seeds  $2,621.35 

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.
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.
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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