Well, something is eating holes in it. Neem oil once a week works for me. I still take some damage but it’s minimal.
Check for bugs
Look very slowly and very closely. Check the tops AND bottoms of leaves. Also follow the main stem n check each intersecting node. Bugs are def the culprit
Ok great thanks. I had looked for bugs but couldn’t find anything. Will check again but much closer like you suggested.
Some bugs like mites you can only see with magnification