I would say 6 weeks for an auto is close to finish. Im not sure if you giving it just bloom nutes with little or no nitrogen but if you are thren give it nitrogen even during flowering. It needs it if that's the case. Im gonna quote UB on this one. " Think out of the RIU, I want to feed my plants bloom nutes and turn my leaves into a non productive yellow, box" Plants need nitrogen during flower too. Green leaves make bigger buds. Yellow leaves are non productive and cause by cutting out the nitrogen and giving it straight bloom foods. Your green healthy leaves are what make big buds, not bloom nutes!