also, it says 'simple science' on that chart, dont look that simple to me lol, canna A+B at half strengh thru veg, maybe 3/4 strengh to full (if they need it) thru flower, adding the boosters (overdrive and bud xl) <these can be any 'booster' you choose, canna has cal/mag in it, but if you struggle, add a little epsom salts and calcium tablets...