I think it means "he's right" (thats what I do anyway...)
For the nutes - I do a bottle of "swap over" food, half the suggested amount of grow and flower food then when thats gone go to the flower food...or, actually I know they need more phosphorus on week 3 if using an addative so what should I do to change food? You reckon that'll be all right, maybe with a drop or 2 of buddy from week 3 onwards? (I'm using bio-grow and bio-bloom...will there be enough P and K in the bloom without needing the buddy?)