Phalaenopsis Update: Yellowing Leaf, Dried Aerial Roots, and Pot Size Concerns

Question:

Dear Wayne,

I have a Phalaenopsis I cut the spike last August and repotted per your advice. New aerial roots grew, but in past months growth stopped and existing ones dried up dead. One bottom leaf is yellowing and limp. Pot might be too big (7")? My apartment is very dry—could underwatering cause brittle aerial roots? Will a spike still grow? Other leaves look healthy.

Answer:

Catherine, older leaves naturally yellow and die—replaced by new growth. Aerial roots often stop growing except in very humid conditions; growth depends more on potted roots, especially in dry air. Yes, a flower spike can still develop. Watch for new leaf growth and spike emergence as health signs.