humidity in the range of 20-30% is ideal for flowering so its ok if its a little low at this point, what it looks like you have going on is a bit of a cal/mag possibly phosphorus deficiency your ferts are lacking in the P with the 24-8-16 you will want to start switching to the flower nutes soon something like a 12-30-10, epsom salt will help with the mag but not the calcium or phosphorus. but if you switched to bloom nutes and added in some epsom salt and maybe top dressed your soil with some crushed eggshells I think you would be good to go man. and get some pics up of the rest of her.