Yes.Cake is used for the final 2-3 weeks before harvest. If your flowering cycle is 8 weeks you would run cake only during the eighth week.If your flowering cycle is 9 weeks you would run cake only during weeks 8 and 9.If your flowering cycle is 10 weeks you would run cake only during weeks 8, 9, and 10.We recommend flushing with tons of plain water on the first day of flush to strip the rootzone of as much remaining nutrients as possible and then feed Cake until harvest.