Request a Catalog   |   Quick Order   |    E-mail Signup   |   1-877-564-6697
My Account   |   Wish List     Johnny's Selected Seeds Login
Package of Johnny's Selected Seeds
Package of Johnny's Selected Seeds
New for 2015! FREE STANDARD SHIPPING On Orders Over $200!*
 E-mail Signup

Disease Resistance:

No disease information found.

Symbols Explained

No additional symbols for this product.

Imperial Star

Imperial StarArtichoke Seed


Product ID: 2120

Earliest 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. Perennial in Zone 7 and warmer; otherwise treat as an annual. Avg. 10,000 seeds/lb. Packet: 25 seeds.

Product Price Qty
2120Packet  $3.95 
2120100 Seeds  $8.60 
2120250 Seeds  $17.50 
21201,000 Seeds  $49.05 
21205,000 Seeds  $208.45 
212010,000 Seeds  $375.00 

Quick Facts

Days to Maturity or Bloom:   85

Plant Cycle:   (A)  

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.

Recently Viewed


Choose Your Shipping Date

Please enter your zip code or select a hardiness zone from the menu below to view the recommended shipping date.

You may also manually select a ship date below.

Ship Date:
Want to change your ship date? Click on the drop down box and choose a different date.

Plant Shipping


Would you like to ship these plants together? Yes No

Incompatable lead time. Please select a new date for both items.

Johnny's Selected Seeds Email Contest Gift Certificate Give Away
Johnny's Farm Crew
Thank you for signing up for growing tips, exclusive offers, and new product info. Close