You could use it now I wouldn't go full strength though, and yes some cal/magNormally I would have used tiger bloom 2-8-4 but the guy at the hydro store told me to use the 0-10-0 instead, I've only grown once before. I guess that's my fault. So I need to find something that's equal or cal mag? Do I trim these dead branches. Next time will the tiger bloom do the job?