Fox farm feeding schedule question.

Hey guys, how is everyone on this nice day.
I'm going to be getting a deep blue sea auto and I'm going to be using fox farm nutes.
I've read about using fox farm and it says you don't really have to start feeding until the first couple weeks.

If this is true than why is the feeding schedule telling me to big bloom in for the first 3 weeks.
That just seems odd that you would have to start giving it nutes as soon as it comes out of the dirt.

Also do you guys give nutes every other watering, or water twice and then use nutes?

What medium are you using?

Make sure you do not use full strength listed on the feed schedule it is way too much for young plants. Starting out use 1/4-1/2 amount listed and go from there. If you use full listed schedule you will end up with nutrient burn at a minimum..