Q: I am growing cattleyas in a window greenhouse. Many leaves and bulbs have started to become wrinkled and creased where they originally were smooth. What causes this?

A: Wrinkled leaves and bulbs are a sign of dehydration. The plants are not receiving enough water. This can be because of low humidity in the home, not enough water being given, or – most likely – root loss/rot, preventing the plants from taking up any water. Spray on the leaves several times per day will help. Pay attention to the root systems and repot if needed.