Bushmaster and purple maxx

Is it true that bushmaster stops vert growth and when is the best time to start purple maxx. Im 4wks in from clone and the lights have been 12 12 for 8 days.

I would be very careful with that bushmaster. less is more with that stuff. i use purple maxx after week 4 of flowering all the way up till my last week. or u could do it the last 3 weeks like the label says.

Do you water or use the foilar method?? Ive been told roots dont bring much up the last 4 to 5 wks. but I really dont want to spray anything other than strait R.O. water on my buds, unless it is truly nec. Im just lookin for max. yield like everyone else.

Dont even spray water the last 4 to five weeks you don't wand mold.