Artichoke

Artichoke (Cynara scolymus) is a cool-season perennial thistle grown for its large, edible flower buds. Plants are imposing, reaching 90–120 cm tall, with silver-green architectural foliage. In Nordic climates it is typically grown as an annual from seed, relying on a short vernalization period to initiate bud formation. Rich, moisture-retentive soil and a long growing season are essential for good yields.

Growing

Start seeds indoors 10 weeks before outdoor transplanting, sowing 1 cm deep in trays at a soil temperature of at least 15 °C. Germination takes 10–14 days. Once seedlings have 4–6 true leaves, expose them briefly to temperatures of 7–10 °C for 7–10 days to satisfy vernalization requirements — this triggers bud formation without fully hardening the plants. Transplant outdoors once nights consistently stay above 7 °C, spacing plants 90 cm apart in all directions. Choose a sheltered, full-sun position with deep, fertile, well-drained soil.

Care

Water deeply and consistently — artichokes demand even moisture but will not tolerate waterlogged roots. Apply a balanced fertiliser at transplanting and side-dress with a nitrogen-rich feed once plants are established and growing vigorously. Mulch heavily around the base to retain moisture and suppress weeds. Remove side-shoots if a few large, high-quality heads are preferred over many smaller ones. In areas with hard frosts, protect the crown with a thick mulch layer if attempting to overwinter.

Harvest

Harvest buds when they are large and tightly closed, before the bracts begin to open or loosen — open bracts signal over-maturity and a tough, bitter bud. Cut the stem 5–8 cm below the bud with a sharp knife. The central terminal bud matures first; removing it promptly encourages the lateral buds to develop. The harvest window for each plant spans approximately 3 weeks. Maturity from transplant is 88–90 days.

In the kitchen

Steam or boil whole buds until a leaf pulls free easily. Serve with melted butter, aioli, or vinaigrette for dipping the fleshy leaf bases. The heart — the solid base once leaves and choke are removed — is the most prized part: grill, braise, or slice raw into salads. Hearts pair well with lemon, garlic, parmesan, and cured meats.

Storing

Freshly harvested buds keep for up to 1 week in the refrigerator, wrapped loosely in a damp cloth or placed stem-down in a small amount of water. For longer storage, blanch hearts for 3 minutes, cool rapidly in iced water, and freeze for up to 6 months. Artichoke hearts can also be preserved in acidulated olive oil for pantry storage.