I checked the nutrient level today. I don't have a very sophisticated tester, but it was registering at the top end of the low on nutrients scale. We fed them with some organic 5-5-5. I didn't do a run off ph, but the readings taken in the soil were between 6.8 and 7.1. Perhaps a little high...
For about a week now we have had lower leaves that are yellowing and developing brown spots. Some have tips that are discolored and drying. I've posted some pics. Never seen this symptom before, but I'm hoping someone here has.