Ok, so you don't have a diary for this outdoor grow so it's a bit hard for anyone to help! I've found that plants, the older they get and the closer they are to harvest, will drink more and more so you may have an issue with root rot. I'd try using some Recharge to reactivate the root structure and to feed the microbes which will in turn continue to make the roots stronger and more able to take up nutrients.
Good luck with your grow - and definitely start a diary on outdoor grows as well as indoor grows... it always helps to have as MUCH information as possible when the community tries to help!