Water Baccharis macrantha regularly, especially during its establishment phase and dry periods. Allow the top few centimeters of soil to dry out between waterings.

Reduce watering significantly in cooler months to prevent waterlogged roots, which can lead to fungal issues.

Prune Baccharis macrantha in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing branches. This also helps maintain a desirable shape and promotes bushier growth.

Avoid heavy pruning into old wood, as it may not resprout.

Propagate Baccharis macrantha from semi-hardwood cuttings taken in summer or from seeds sown in autumn or early spring. Cuttings should be treated with rooting hormone and placed in a well-draining medium.

Seeds may require stratification for better germination.

Repot Baccharis macrantha when it becomes root-bound, typically every 2-3 years. Spring is the ideal time for repotting.

Use a well-draining potting mix and select a pot that is only slightly larger than the current one to avoid overwatering.