What do unhealthy orchids look like?

Unhealthy orchids may have yellowing, browning, or wilting leaves. Their flower spikes may be dry, and if not, their flowers may be fewer in number and smaller than usual. If you suspect your orchid is unhealthy, take a close look at its roots. Healthy roots are silvery white, or green with small white spots when watered; unhealthy ones are black, brown or mushy.