Hey Growmie,
I use the same Flora Trio that you're currently using on both autoflowers and photoperiod plants but in modified Lucas Formula to prevent nutrient burn, I listed it below for you
Week 1: Plain ph balanced water
Week 2: 2ml Cal-Mag
2 ml Micro
4 ml Bloom
Week 3-5:
3ml Cal-Mag
3ml Micro
6ml Bloom
Week 6-Until Harvest:
4ml Cal-Mag
4ml Micro
8ml Bloom
Don't worry about using the FloraGro there is enough nitrogen for the plant just using the micro and bloom, and make sure to add the cal-mag every time you water since your using R/O water.
Hopefully, this was helpful and remember ..."Happy Growing" and "Free your mind one puff at a time".