looks like you have some banana leaves goin on, in pic #3. There are multiple causes for this. The first could be that you are over/under watering your plants. The second could be a magnesium deficiency, and the third being that you could have a potential pH problem. Have you checked your soils runoff pH? Are you using any cal/mg supplement? It's always good to nip these things in the bud before they get out of hand. besides that, things look good!