Sativa, grow to bloom question #2

Im a newbie to the forum please excuse my lack of etiquette.

I have two plants growing in my back yard (medical/legal) one indica dominant strain, and one sativa dominante (white Bhutanese, Mandala seeds). My latitude and temps/humidity are fine for sativa, northern hemisphere. 7 gallon smart pots.

2nd grow for me, 1st with a sativa.

My question refers to the white Bhutanese and possibly sativas in general.

The strain guide implies that nutes should be given throughout the lifecycle of the plant. At what point should i switch from Grow to Bloom nutes? Or do i need a combination of both?

Obviously my indica has started heavy flowering and i have given bloom +moderate nitro for 2weeks and will go straight to bloom in 1-2 weeks with a projected 2 week flush once im atleast 50% amber.

This is also my plan on the sativa but modified for the longer harvest time (aprox late oct early nov). When/should i switch nutes?

I always assume I will be at least 9 weeks in bloom. I break it up into 3 week sections. First 3 weeks continue with veg nutes. 2nd 3 weeks do 50/50 veg and bloom nutes. Last 3 weeks just bloom nutes. I also add Epsom salts during the entire bloom, and brown sugar for the first half of bloom.

Larry, ty for that info, so the epsom salt for mag? Is the calcium portion of calmag in your recipe aswell? How much epsom salt are you adding per gallon of water? Lastly i was wondering about the molasses some speak about adding, the brown sugar covers that, how much are you adding? Why only first half of bloom?

I liked you comment its one i can actualy put into use.