I wanted to re-pot, but not wanting to gamble with peppers already growing, wasn’t sure if it would be their demise. I rarely have to deal with plant diseases or problems, so I dont have stuff the check nutrient levels. Normally, we just move on after a plant fails and replace it with something else, but I want some really hot peppers. Under normal condition, it is either too much or too little sun that is our problem. We water everything at the ground, never above on the leaves.
My only other suggestion is to go to:
www.tomatoville.com
and see if they have any idea. There’s a whole pepper forum over there IIRC.
Watering at ground level in pots can still lead to harmful salt/mineral buildup.
When I am stumped, and not sure about stuff, here is, what I do. Treat with pyola both sides of leaves, good dose of 15 30 15 or 15 15 15 water soluable for quick results or use similar organic stuff like blood meal, bone meal. Add long term release granules such as osmote or other brand.
Switch to steady watering via ceramic gizmo and plastic soda bottle. Sometimes I also treat with fungicide. Cut off infected leaves. Pick the plant with the least fruit, and repot it giving a good inspection to the roots.
That’s all I can think of. I surely don’t know why they are doing well.