Posted: 09/02/2014 at 10:50
I have the same problem with a red pelargonium overwintering indoors. Slug pellets have not had any effect. I also had caterpillars last winter but this culprit is different. It leaves droppings on the stone floor next to the pot larger than mouse droppings. I looked underneath the pot this morning and saw two small worms. I have removed then. Could earthworms be eating large, neat circular portions from the leaves?