too much nutrients in soil?

Hi guys, I planted my seedlings about 3-4 weeks ago in small containers. Well. Now I need to get soil that drains well to transplant them. I wanna go with FoxfarmOcean Forest because that gave me excellent results before BUT ffof feeds seedlings and plant for 4 WEEKS with mostly vegetative nutes. My seedlings are already 4 weeks old and I do not want to overfert them by transplanting in big pots with ffof and use my general organic nutes. Is there a type of light fluffy soil that does not contain nutes or very very little? Any help would be most appreciated!
 
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