That's pretty powerful stuff you got hold of, be mega careful about burning your guys. Or better, don't use it. Invest a few bucks in a flowering blend from a grow store.
Yeah too much N, but you could still use it. Buds might be alot leafier than using some other nutes with less N but should still produce some nice buds. Make sure to flush for at least 2 weeks though. What brand ferts are they anyway?