Water Genista cinerea moderately during its growing season, allowing the soil to dry slightly between waterings. Reduce watering significantly in autumn and winter to prevent root rot.

Ensure good drainage to avoid waterlogged conditions, especially for potted plants.

Prune Genista cinerea after flowering to maintain its shape and encourage denser growth. Remove any dead, damaged, or crossing branches. Light pruning can be done annually to keep the plant tidy.

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

Propagation is typically done from semi-hardwood cuttings taken in summer. Root cuttings in a well-draining medium, often with the aid of a rooting hormone.

Seed propagation is also possible but may require scarification or stratification for germination.

Repot Genista cinerea every 2-3 years or when it becomes root-bound. The best time to repot is in early spring before new growth begins.

Use a well-draining potting mix, such as a mix for succulents or cacti, to ensure adequate aeration and drainage.