It appears You have nutrient burn or wind burn discoloration on some lower leaves, have you topped it? It also appears you have a bunch of lower leaves bunched up blocking air from getting to your container. Also what temp are you watering those with it should always be lukewarm, and your water should not be hard if its tap water hopefully. Also what size are your containers, are they aerated all around with bottom drain holes, are they at least 15 inch deep, did you cause soil compaction when you added the soil are all huge factors in your grow but future problems in a plants life actually has little to do with ph, and nutes but rather more to do with soil compaction. This happens for a couple reasons. Btw i also grow with tap water and no ph adjusters and my water is documented at ph of 9. As for nutes, it is possible to overnute but again, its usually soil compaction that people dont consider as much. Only really experienced growers notice. When you initially lay out the soil, only very slightly press it down. Don't worry so much about air pockets but you can vibrate the soil once finished. Getting rid of the pockets is all about how well you water your medium. If you pound it too hard with water you will have soil compaction. Always lets there be a bit of water runoff every time you water. Very few people do this indoors and its as simple as elevating your pots in a bowl and sponging the excess. This is super important because it closely resembles nature as it allows all soil to be watered evenly, given you dont have a bunch of bottom leaves prohibiting you from reaching certain areas, avoid letting water hit the leaves as much as possible keep watering device low. Here are my 3 and I show normal yellowing of leaves bottom up first. I've been growing for a long time. This is my latest . They are king kongs indica dominant
