Grammatophyllum multiflorum prefers consistent moisture during its active growth phase. Water thoroughly when the potting medium is nearly dry. Reduce watering significantly during the dormant period to prevent root rot.

Ensure good drainage to avoid waterlogged conditions, which can be detrimental to its health.

Pruning is minimal for Grammatophyllum multiflorum. Remove spent flower spikes and any dead or yellowing leaves. Cut back aerial roots only if they are damaged or obstructing growth.

Avoid excessive pruning, as this can stress the plant and hinder future flowering potential.

Grammatophyllum multiflorum is typically propagated by division.

When the plant becomes overcrowded and during repotting, carefully divide mature pseudobulbs, ensuring each division has at least three healthy pseudobulbs and some roots. Allow the cut surfaces to dry before repotting.

Repot Grammatophyllum multiflorum every two to three years or when the potting medium has broken down. Choose a pot size that accommodates the root system without being excessively large. Use a well-draining orchid mix.

Repot after flowering or in early spring when new growth begins.