I'd stop your nutes either right now or continue for one more week and then stop. You probably have between 2-4 weeks before you're finished depending on how mature you want your plant to get and depending on whether or not you want all of your pistils to be amber. Make sure you flush for at least one week, perferably 2 weeks before harvest.
If you let the plant mature for too long the THC will actually start to decompose and actually lower it's effects so you don't want to wait too long to harvest. Plants are looking good though =D