Not really sure what's going on with this plant, it has been progressively yellowing from the bottom while the plant next door has been the picture of health with identical conditions.
And putting your plant next to a window and expecting it to grow HUGE also does not cut it. Direct Light is what you need.
Mmm, I probably should have described the growing conditions better they're out on a corner of a balcony that gets around 7 hours direct sunlight a day (thanks for your input though). See attached for the plant's next door neighbor which came from the same seed-stock and has had identical feeding/environment etc.