Young padawan. Your soil mixture should have enough nutrients to get your plant through for quite some time.. Your plant looks heavy and nitrogen saturated.. I recommend you try just water for a weak.,.. Phed or not.. Depending on your soil if it has peat moss in it.. It most likely has an acidic content already which just so happens to be a great thing to grow cannabis in. Pay no attention to schedules in a sense.. there are only guides or outlines.. And they are really aimed at hydroponics or soilless growers. So save yourself a ton of money. use water. Your plant will be happier and you will be as well because she will grow like she is supposed too. Salts in the medium that is rich in nutrients creates a bunch of problems..