California lovage prefers consistent moisture but can tolerate some drought once established. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogged conditions, which can lead to root rot.

In hot, dry periods, increased watering may be necessary to maintain healthy growth and prevent wilting.

Pruning is primarily done to remove dead or damaged foliage and to maintain shape. After flowering, spent flower stalks can be cut back to encourage a tidier appearance.

Minimal pruning is typically needed, as the plant has a natural, attractive form. Avoid heavy cutting back unless the plant becomes overgrown.

California lovage can be propagated by seed or division. Seeds can be sown in autumn or early spring, often benefiting from a period of cold stratification.

Division of established clumps is best done in early spring as new growth emerges. Ensure divisions have adequate roots and are replanted promptly.

Repotting is rarely necessary for Ligusticum californicum as it is often grown as a perennial in the ground.

If grown in a container, repot in early spring before new growth begins, selecting a pot only slightly larger than the current one. Use a well-draining potting mix to prevent water retention issues.