Water thoroughly when the potting medium is nearly dry, typically once a week during active growth. Reduce watering in winter to prevent root rot.

Ensure good drainage to avoid waterlogged roots, as this orchid dislikes sitting in water for extended periods.

Pruning for Cymbidium dayanum is minimal. Remove spent flower spikes close to the base of the pseudobulb once blooming is finished. Trim any dead or yellowing leaves to maintain plant health and appearance.

Avoid cutting healthy green foliage.

Propagation is primarily done through division. When the plant becomes overcrowded or too large, carefully divide the pseudobulbs in spring.

Ensure each division has at least three healthy pseudobulbs and a few healthy roots for successful re-establishment.

Repot Cymbidium dayanum every two to three years, or when the potting medium has broken down. Use a well-draining orchid mix.

Repot after flowering, ideally in spring, to minimize disturbance to the plant and allow roots to establish before the next growth cycle.