Hello, growing some what i assume is island sweet skunk. All was going well during the vegetative state however about roughly 3-4 weeks into flower the tips of the plants leaves looked burnt (nute burn as far as I can tell.). So I flushed them 3x to be safe with Ph'd water, the run of was 6.4. Then another problem occurred the leaves stems are turning purple and one of the branches leaves close to the bud was turning completely brown. The rest of the plant looks relatively fine and the newer leaves are healthy, primarily the bigger leaves that have the burnt tips.I can take more pics. Temps have been hitting a couple of times 90 degrees but that it about it when it comes to temps being unusual. Please any help would be appreciated.