PlantPalBlisters or corky bumps on leaves
Firm bumps that are part of the leaf may be edema, a response to a water imbalance.
What to check first
Look under the leaf. Edema can start as tiny blisters and leave rough, corky marks. If you see separate shells, insects or sticky residue, also check for scale.
What to do now
Let the mix dry to the level the plant tolerates between waterings and empty standing water. Give the foliage room for air to move and keep the plant in suitable light.
What to watch next
The old bumps may remain. If new leaves are smooth, the adjustment may be helping. If new bumps appear alongside sticky residue or visible insects, check again for pests.