Stanhopea wardii - yellowing pbulb

[estación seca]

Originally Posted by rbarata

Do you see in the plant any signs of a lack of fert?

Yes. The older pseudobulb is dying so it can supply nutrients to the younger growth.

This group of orchids requires much more nitrogen fertilizer than some others. In general, any plant with relatively larger leaves than its relatives will require much more nitrogen fertilizer than its smaller-leaved relatives. These plants have a lot more tissue to produce.