I have two plants planted in the ground outside they have been outside since march and recently one plants has started yellowing at the top and turing purple with some black tips, i noticed this more after i bent the branches down so they wouldnt get over the fence. Ive been feeding them a bunch of diffrent nutrients at different waters so its hard to say if it is an excess or not because the other plant is healthy and fine. I think it could be a fungal or bacteria related problem becuase for the past week i havent fed them any nutrients only some recharge, fulvic amino , humic acids, coconut powder. I foliar fed them a couple nights ago with some btk to help with caterpillars and some Mono potassium phosphate at 0.5 grams per gallon.