Allow the soil to dry out completely between waterings. Euphorbia lignosa is drought-tolerant and prone to root rot if overwatered. Water sparingly, especially during cooler months, ensuring excellent drainage.

Reduce watering significantly in winter dormancy to prevent soggy conditions.

Prune to maintain shape and remove any dead or damaged stems. Use a sharp, clean knife or shears. Since it's a succulent, wear gloves to protect yourself from the milky sap, which can be an irritant.

Pruning can also encourage branching and a bushier appearance.

Propagate from stem cuttings taken during the spring or summer. Allow cuttings to callus over for a few days before planting in well-draining soil mix. Alternatively, seeds can be sown in spring.

Success rates are generally higher with cuttings.

Repot every 2-3 years, or when the plant becomes root-bound. Use a gritty, fast-draining potting mix, such as a cactus or succulent blend. Choose a pot only slightly larger than the current one, with drainage holes.

Repot in spring, before the active growing season begins.