it wont higher thc realy i dont think, just bulk up ya buds n make them swell up as its PK, im sure u need a little bit of N in there tho, its a last stage bloom i think
N= Nitrogen. This is the most important nute for Vegitative growth. It get's the plants green and going strong in the early ages of development. Once in Flowering you need to cut the nitrogen down a lot.
P= Phosphorus. This is important during flowering. It causes your buds to swell up. The amount of P is low during Veg and dramatically increased during flowering.
K= Potassium. Some people like high levels throughout the whole grow. It is supposed to increase your foliage and make your plants fatter and fill in more. Also increased levels during flowering...