Fox Farm Trio Nutes for Autoflowering strains

OK, I have the feeding schedule for the the foxfarm nutes but wanted some input on how to adjust it for autoflowering strains. I will be growing lowlife ak47 and it should be done in 9 weeks from germ.

Im assuming after week 3 to switch to the feeding for the 12/12 cycle even though im gonna go 20/4 the whole way thru. my biggest question is since the standard feeding sched is for more than 9 weeks and i will need to flush for at least the last week, when would be best to switch from the second to third phase in the feeding.

Any opinions are appreciated.

noone has any thoughts??

I'm assuming you are using this schedule:

http://www.4hydroponics.com/nutrients/Mnl/foxFarmHydro.pdf

I would personally give no nutes the first two weeks. Then start weening it on nutes at half strength. If by the beginning of the third week (when you start half nutes) your plant has shown no signs of sex, give it week four of the veg cycle nutes. When you plant shows sign of sex, flush your system, and start on the flowering nutes. Flower for 56 days and then harvest.

does ph tend to fluctuate very much with the fox farm nutes?

No more than others I have used(GH, AN). I like to check my levels every 2 days just to be safe.