Water Pyracantha angustifolia regularly during the growing season, especially when young or during dry periods. Allow the soil to dry out slightly between waterings.

Reduce watering in fall and winter to prevent waterlogged roots, which can lead to root rot. Good drainage is essential for this species.

Prune Pyracantha angustifolia after flowering to shape the plant, remove dead or damaged wood, and improve air circulation. Major pruning should be done in late winter or early spring before new growth starts.

Pinch back new shoots in summer to encourage a bushier habit and more fruit production.

Propagate Pyracantha angustifolia from semi-hardwood cuttings taken in summer or hardwood cuttings taken in winter. Cuttings should be treated with rooting hormone and placed in a well-draining medium.

Successful propagation requires patience and consistent moisture and warmth.

Repot young Pyracantha angustifolia plants every 2-3 years in spring, or when they become root-bound. Use a well-draining potting mix.

For mature plants, repotting is generally not necessary unless growth is severely restricted. Ensure the new pot has adequate drainage holes.