Grammatophyllum kinabaluense prefers consistent moisture, especially during its active growth phase. Water thoroughly when the potting medium is almost dry to the touch.

Reduce watering during the cooler, dormant periods, allowing the substrate to dry out more between waterings to prevent root rot.

Pruning is minimal for Grammatophyllum kinabaluense. Remove spent flower spikes and any dead or damaged leaves or pseudobulbs as needed.

This helps maintain plant health and directs energy towards new growth and flowering.

Propagation is primarily done through division. When the plant becomes large and overcrowded, carefully divide the pseudobulbs, ensuring each section has several healthy roots and pseudobulbs.

Allow cuts to dry before repotting.

Repot Grammatophyllum kinabaluense every 2-3 years, or when the potting medium begins to break down. Use a well-draining orchid mix. Repotting is best done after flowering when new root growth is initiated.