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

Porto Spineless

Porto SpinelessCardoon Seed


Product ID: 1749

Artichoke-flavored leaf stalks.

The leaf stalks and midrib of cardoon have a similar flavor to artichoke when boiled (not for eating raw). Both portions are commonly used as a side vegetable, addition to stuffing, or in soups and stews. Cardoon must be blanched before it can be eaten. To blanch, tie the stalks up firmly and wrap with black plastic or black and white newspaper. If left unharvested, the 3-4' tall plants will produce large purple, thistle-like flowers. The sharply lobed and serrated, silver-green leaves add a unique addition to flower arrangements. Perennial in Zones 6-10. Avg. 850 seeds/oz. Packet: 25 seeds. Avg. 12,350 seeds/lb. Packet: 25 seeds.

Product Price Qty
1749Packet  $3.95 
174950 Seeds  $5.75 
1749250 Seeds  $9.45 
17491,000 Seeds  $25.25 
17495,000 Seeds  $107.30 
174910,000 Seeds  $164.10 

Quick Facts

Days to Maturity or Bloom:   100

Plant Cycle:   (TP)  

Product Symbols:

Use for cut flowers and bouquets  

Shipping Information & Notes

This product cannot be shipped to the following states:CA

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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