My Pilea has areas with black dots on the leaf bottom (only on some leaves). They are clearly not ON but IN the leaf. They are smooth and one can not scrape them off. The plant lately lost some lower leaves, but looks vital overall.
I can’t find any parasites (no thrips, mites or aphids). Is this some kind of other parasite or disease? Or just some irregular growth?
Plant is growing in LECA. Also needs repotting. It gets watered every ten days and the pot has good drainage. It is growing under medium indirect light conditions.
by Mossy_bug
2 Comments
Mineral deposits – you probably have hard water.
I’m not sure about the black stuff
https://www.reddit.com/r/PPeperomioides/s/EvBLE0q5Tw
[citrus black fly](https://plantwiseplusknowledgebank.org/doi/10.1079/pwkb.species.4137)