flowering help small ealry

Hey guys so i have my first grow on the way 3 days in to flower, and started running in to some trouble, light yellowing of the leaves and whats looks like salfur def, also rusty spots. (Pics to follow) Now i watered yesterday with canna flores, pk 13/14 canna boost , riz , cal-mag, cannzym...

hi my auto looks like it's flowering allready is it ? and do you think it will grow any taller ?