Depends on what phase of the plants life cycle it's in. It's not a bad ratio for vegging, but it won't do you much good for flowering when you need higher P and K levels. I personally use dyna grow (7-9-5) from the last week of vegging ( I don't give nutes before then because the potting soil has more then enough) and start supplementing it with jacks classic (10-30-20) about week 3 of flowering when the bud production really starts kicking into high gear.