Hey PottingShed!! I would start at 1/4-1/2 strength of what they recommend on the feed chart. If the plant is happy with that keep it there unless or until you notice it needs more.Then start to slowly up the amount a little and when the plant is happy leave it👍 As for how often when i ran it I did Feed-plain pH'd water- Plain pH water- Feed and it worked great. Happy Growing!!😎