What’s this black stuff on my zebra plant leaf? There were three little leaves that just recently fell off the very top of the stem. Should I cut this one off, or should I just let it fall on its own? I got this plant back in August, when it was already leggy, (I could change him, right?!) and we were doing so well. I also have had off and on fungus gnats as well, which I’m treating with mosquito bit/neem oil watering and sticky traps. I don’t mist the leaves. My peperomia plant next to it also has all of these dried up triangles in the leaves. Is it a pest?



