To ensure that you can enjoy your geranium splendor for a long time, you should check geraniums regularly for pests.

- Brown pustules on the underside of the leaves indicate rust.
- If the coating is gray instead of brown, it may be gray mold.
- If cork-like stains appear, then the water supply is too high.
- If you notice holes in the leaves, butterfly larvae may be responsible.
Here's what you can do about it:
- Water less, especially when the humidity is already high.
- Cut off affected leaves liberally to avoid spreading the fungus or mold to the rest of the plant.
- Simply collect any butterfly larvae and dispose of them.
With these measures you will get great geraniums that will give you a lot of pleasure.