The eldest leafed turned dry and yellow. They are short and seem weak, not developing enough. I've been watering day on and day off with biobizz's nutrients. What I am doing wrong?
You shouldn't be watering daily outdoor unless you are getting high temps and sun daily. In order for your roots to expand which in turn will give you better plant you must let them expand by searching for moisture/water. Your plant is already flowering therefore you will not get anymore growth from this one. You can focus on trying to get the biggest cola. For that she will need maximum sun possible.