Since 2 weeks I have noticed that the leaves on my pilea started to have clusters of small dark spots. I'm wondering if it is a bad sign and whether I should do something or change something.
So far, I made sure that the soil can be drained enough, by using a clay pot, with drainage holes, and I put some clay small balls at the bottom of the soil.
I haven't repotted it for ~18 months and the plant is ~ 2.5 years old.
I really like that plant, so how can I make sure it keeps on thriving? :)