Once you have 2 weeks left on the bud you can stop feedings and use just ph'd water.
Use colder water to bring out purples in plants that are genetically predisposed to do so.
Good luck and stay lit growmie.
Decrease to half strength when you have 2 weeks left. That's it. Don't bother flushing. Keep feeding at half strength.
You can stop giving her nutes in the last week, but only do that if you're concerned about the cost of the extra nutes.