Green Globe Improved Artichoke Seeds

OSC 1105

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Green Globe Improved Artichoke Seeds 1105 Heirloom Vegetable. First year artichokes are small & few in number but can still be suitable for harvest. Higher quality artichokes develop in the second and third years – therein lies the gardener’s greatest challenge. Artichokes will not survive winter in most areas of Canada! We suggest digging up and overwintering dormant roots in a cool area indoors if you do want to try for a second year harvest. “Green Globe” has deep green buds with a slight purple tinge. The artichoke flowers are best harvested when 5-9 cm (2.5-4″) in diameter. The fleshy base of the flower scales and the firm centre are the edible portions. Plants can reach 1.5 m (4.5’) in height in one year. Artichoke is a tender perennial hardy from zone 7 up. Photo by Magpi-Moon under the Creative Commons Attribution License 2.0.

How to Grow

20 seed/gram. Start seed indoors in a soil-less mix 8-12 weeks before the last frost date in your area. Sow the seed 6 mm (1/4″) deep and germinate at 21-26 C (70-80 F). When seedlings are 2.5-5 cm (1-2″) high transplant to individual 10 cm (4″) pots and grow on at 15-21 C. Harden off and transplant to the garden after the threat of frost has passed. Artichoke does best in full sun with a deep, organic, fertile soil. Space plants 60-90 cm (24-36″) apart in the row with rows 1.75 m (6′) apart. Keep plants evenly watered and mulch the soil to help preserve soil moisture and keep the soil from becoming too warm in summer – if the soil does become too warm, it can trigger a summer dormant period. Start with a thin layer of mulch and build it up to 10 cm (4″) thick as the plants grow.


Ritchie’s has over 90 years of experience when it comes to gardening in the Ottawa area. Ask the Expert any of your gardening or agricultural questions..