Well, isn't that simple and with the question you show your lack of education in the entire field. There are many threads on this site you need to research on. Not just for this question but for the entire experience of growing your own medicine.

Cannabis needs little N to grow like a weed. In fact, I see N burn often.

So my suggestion if you want to supply N, is use a good potting soil mix WITHOUT any added nutes. My choice is Fox Farms, Ocean Forest from seedling to finish. I never, ever give N, rarely give more than molasses and if I do I have a specific reason for giving it, know exactly how much to give over the course of a grow and how to get rid of any excess there may be to affect the taste. If you really MUST then give dry bat guano sparingly.

The above paragraph has answers all over this site to the intense statement I made. So do not be afraid to ask questions, and some folks may jump on you in the beginning, as I almost did. I wanted to grab you by the Uhm's and get you on the right track right away.

Become familiar with the troubleshooting form. Ask questions why we might want to know certain info. Enjoy your educational experience.
WW