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[Cynara cardunculus var. altilis] Cardoon seeds, an ancient relative of the artichoke grown for its tender, delicately bitter leaf ribs.
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Cardoon, botanically Cynara cardunculus var. altilis, is an ancient, somewhat forgotten vegetable, grown since Roman and Egyptian times. Closely related to the artichoke, it's the fleshy leaf stalks, or ribs, that are eaten, with a distinctive, delicately bitter flavor.
The plant is large and striking, with thick ribs and lance-shaped leaves that can grow over a meter and a half tall. It belongs to the Asteraceae family, the same as the artichoke, with hermaphrodite flowers in shades of blue-violet. Varieties range from more to less thorny, such as the giant Romagna cardoon, the Chieri cardoon, or the Bologna cardoon, which is thornless.
Sow between April and May, directly in the field in rows about a meter apart, with 80-100 cm between plants, or in clusters of 3-4 seeds per hole at a depth of about 2 cm, later thinning out the weaker seedlings once they reach 6-8 leaves.
It prefers rich, cool, deep soil, prepared with thorough tilling and generous organic feeding. It grows vigorously in the summer heat, giving an autumn-winter harvest. To get more tender, flavorful ribs, growers practice blanching, covering the base of the plant to reduce its light exposure.
Mulching helps keep the soil moist and weeds under control. It pairs well with onions, carrots, spinach and radishes. Being a biennial, if left in the ground it will flower, producing a head similar to an artichoke, from which seeds can be collected for the following year.
It's a fairly hardy plant, but can be affected by aphids and slugs on young leaves. Powdery mildew can appear in overly humid conditions; good airflow between plants and regular, moderate watering help prevent it.
Cardoon is a classic ingredient in Piedmontese and Italian cuisine in general, the star of the famous bagna cauda dip, and also excellent oven-gratinated or fried in batter. There's even a curious curved variety, the "cardo gobbo" (hunchback cardoon) of Nice, obtained by artificially bending the stem as it grows.
| Nutritional values (100g) | |
|---|---|
| Energy | 17 kcal |
| Protein | 0.7 g |
| Fiber | 1.6 g |
| Potassium | present |
| Calories | very low |