Water only from now on. They're almost done. Those yellow and purplish leaves at the bottom is P being used up out of the leaves. It's cannibalizing them. But at this stage I wouldn't add more P since they won't need it. You're in soil so it will have plenty left to get you through till the end. Next time use a little less N in flower. The clawing and burnt tips is N toxicity. Not bad for a first grow though. Nice job.