When do i switch food?

[JaySin]

first i would start by reading the directions. my best guess is that you would use the grow during the veg stage and the flower during the, er flower stage? best guess.

-shake

Oh man, that just answered everything.

I'm kinda wondering the same thing though. Cause it's not like the plants immediately flower as soon as you switch to 12/12. They stretch and prepare first.

My GUESS, is that after a week you would want to switch to flower nutes. Because by then they should be starting to flower and done stretching for the most part. That's just a guess though, I'm only on my first hydro grow and it's still in veg. I didn't really do much with nutes on my soil grow, I just know I didn't do them right.