Fennel thrives in a sunny, sheltered position with well-drained, fertile soil. It prefers a spot that isn’t too crowded, as it develops deep roots and can self-seed freely if not managed.

Once established, it becomes more drought-tolerant and requires only occasional deep watering during dry spells. Regular harvesting of leaves encourages fresh growth.

Mulching around the base in winter can offer protection in colder areas.

If fennel is being grown exclusively for its foliage, remove the yellow flowerheads to prevent it from self-seeding. When flowers have finished them cut back to 30cm (12in) from the ground.