Cow Parsley prefers consistently moist soil, especially during dry spells. Water deeply at the base of the plant when the top few centimeters of soil feel dry. Avoid waterlogged conditions, as this can lead to root rot.

Regular watering promotes vigorous growth and better flowering.

Deadheading spent flowers can prevent self-seeding and encourage a tidier appearance. Cut back the plant in late autumn or early spring to remove dead foliage and spent flower stalks.

Pruning encourages new growth and maintains plant health. Remove any diseased or damaged stems promptly.

Anthriscus sylvestris readily self-seeds. To propagate, collect seeds in late summer or autumn and sow them in situ or in pots. Alternatively, divide established clumps in early spring or autumn.

Young plants can be transplanted to their desired location during the cooler months.

Repotting is typically not necessary for Anthriscus sylvestris, as it is often grown as an annual or biennial from seed and can be easily transplanted when young. If grown in a pot and it becomes root-bound, repot into a larger container in spring, using well-draining potting mix.