Flowering/nutes?

All of these plants seem to be in flower with the exception of the large leafed indica that looks like its just getting there. You should already be using some type of PK with your nutrients. Plants tend no to need much after the stretch though if you want to keep to your feed table that should clear it all up for you and give you a good base to start with and if you see any problems then you can adjust that then. Though your plants look really healthy so I would just carry on doing what your doing. I know why your asking though as we all want to pump her full of as much nutes as possible to get fatter buds but most the time its just not the case. Time does more for a plant than nutrients. With it being your first one I would personally go slow and steady and get a nice smoke at the end of it. though this all depends on what your growing for of course be it yield, Quality or weight. The balls in your court pal she is your lady :) best of luck for the last few weeks I would advise only upping the PK if you see she is needing it. Lack of phos will throw out purple colours on your plant many growers will add pk in the last 4 weeks thats when they can truly utilize it. :)