Heck yeah man, do it up!
Your plants will absolutely love the extra phosphorus and potassium. Don't forget to feed the soil, as well. Two tablespoons of unsulfured blackstrap molasses per gallon of waterwill help the microbes in your soil grow and break down more nutrients for your plant. If you can afford it, grab some Roots Organic bio-force too, if you haven't already.
Good luck!