Be careful using supplements.
Molasses and TopMax are pretty safe, and used TOGETHER, are a fabulous combination for enhancing flavor and aroma. MMMM that's how I do it myself.
Actual FERTILIZER boosters, just be careful that you don't burn your plants- don't use them if you are already seeing any sign of fertilizer scorch!!!
If this is your first grow, you might do well just to stick with the basics and make sure you can make it through to harvest, then start playing with supplements on the next go.
PK 13/14 is not something I have personally used but it is a very solid product.