Make sure you don't let the soil too long you don't want to go to other extreme lol. You should probably look at foxfarms nutrients. Look for the ones called growbig, tiger bloom, and big bloom, they usualy come in a 3 pack (at least online usualy. If you want to talk to the guy at the store about it you could say your growing tomatoes because most nutrients that are okay for tomatoes are ok for cannabis.