Artichokes & Cardoon

Imperial Star Artichoke Conventional & Organic

Imperial Star Artichoke Conventional & Organic


This artichoke is for gardeners who can't overwinter artichokes or just want to grow them as an annual. The 6-8 buds of Imperial Star are nearly spineless, up to 3-4 inches in diameter, globe-shaped, and a rich glossy green. Imperial Star has the same rich flavor as our old favorite Green Globe. Will perennialize in areas above zone 7. Plant Variety Protected.

   Open Pollinated
Approximately 15-20 seeds per gram.
  • AR002/S
  • 1 gram
  • $4.55

  • AR002/L
  • 1 gram Organic
  • $4.95

  • AR002/P
  • 4 grams
  • $11.25

  • AR002/M
  • 4 grams Organic
  • $12.75

  • AR002/B
  • 1/2 oz
  • $31.95

  • AR002/N
  • 1/2 oz Organic
  • $36.85
  • More Information
  • Customer Reviews (4)
Seed DepthSeed SpacingSoil Temp for Germ.Days to Germ.Thin Plants To Approximately 15-20 seeds per gram.
1/4″See Below65-75°F10-203′

Cynara cardunculus var. scolymus: The flower buds of the artichoke are the harvested part of the plant. Artichokes are reported to contain the highest level of antioxidants of all vegetables!
C. cardunculus: Cardoon is a relative of the artichoke. Instead of consuming the flower as with artichokes, the fleshy leaf stems are eaten.

CULTURE: Artichokes and cardoon appreciate conditions that foster rapid growth. Start indoors in late January or early February; sow seeds in 4 inch pots filled with sterile seedling mix. Sow heavily and expect 70% germination. Of these seedlings, about 20% will not produce high quality plants. Cull out the small and albino plants. Fertilize transplants with a good all purpose liquid fertilizer such as Earth Juice Grow 2-1-1. Transplant after the danger of frost has passed, but when the seedlings can still receive 10-12 days of temperatures under 50°F, which induces earlier budding. The period of cool temperatures needed to stimulate growth and flowering varies with location and variety. Space transplants 3 feet apart in rows 3 feet apart. Work in 1 cup of our complete fertilizer or a shovelful of composted chicken manure per plant.
After the first year's harvest, remove off-types and less vigorous plants leaving a final spacing of 5-6 feet between plants. In late October, cut plants to about 8-10 inches above ground and cover with straw or leaves to keep the stump from freezing. Uncover in early April. Overwinter survival is likely but not certain. Regrowth will be offshoots of the parent plants.
DISEASE: Relatively disease-free.
HARVEST: Cut flowers before they start to open. The smaller, immature artichokes are the most tender. Rub the cut 'chokes with a slice of lemon to prevent discoloration. Cardoon can be harvested green or blanched white by wrapping the young stalks with newspaper or piling straw around the plants for 30 days prior to harvest. Store at 36°F and 100% relative humidity.
SEED SPECS: Minimum germination standard: 70%. Usual seed life: 1 year.
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Oct 12, 2013  |  By Sarah Zuber
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I was told by a couple of people that artichokes don't grow here in Central Oregon. I proved them wrong! I ended up with 2 gorgeous plants (only 2 due to cut worms). They produced ample artichokes. I am more that happy with this breed. Summer 2013.
Feb 12, 2013  |  By Kari
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In 2012 I planted 2 Imperial Star plants and was surprised to have 13 and 18 flowers on each plant! All but the last 2 were of large size and the flavor was amazing. They have over wintered well. The name fits it well!
wonderful addition
Feb 9, 2012  |  By maggie
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Have planted this variety for 2 years in NJ (zone 6a) with strong results. Plants,surprisingly overwintered in both mild and severe winters. My crop was tennis ball sized, but the plant was a beautiful addition to my garden and I allowed some to flower for the decorative appeal. Somewhat subject to insects and mildew, but otherwise a winner.
My experience
Jan 29, 2012  |  By Shawn
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Territorial states 15-20 seeds per gram so I was expecting 60-80 from the 4 grams I purchased. I counted 108. I soaked 22 seeds for about 16 hrs or so, then placed them in a bowl between a folded moist paper towel and placed it on top of my fridge. Two days later a few started to sprout and there have been a few more everyday since. I plant each seed in a pot the day after they sprout. It has been 6 days since I placed them in a paper towel to sprout and so far 17 out of 22 have sprouted. I had read quite a few reviews where people had problems getting artichokes to sprout so I was planning to plant around 60 just to get 25 or so plants but now I see that won't be necessary.