OVERDRiVE should i use in soil detailed information

I am currently in the middle of week 5 I have been using to farms big bloom and tiger bloom along with big bud for the past wee and a half and flowers look great I would like to add in some overdrive from advanced nutrients as I have heard great things I am going to discontinue big bud this week and try and add overdrive along with big bloom and tiger bloom how should I use it do I use it for weeks 6 and 7 and flush on week 8 and also how much do I use in a gallon of water I am growing in ffof soil mixed with some perlite and happy frog
 
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