I have been a big fan of Osmocote (one application in Spring, time-release) fertilizer. This year I picked up a big bag of 19-6-12 Osmocote and wonder if this is too high in Nitrogen for dahlias? I have seen reference to 10-10-10 for dahlias and now I'm looking for input before I create a forest of leaves vs flowers.

I'm pretty sure this is the same forumla I used last year and was happy enough with my 'crop.' But one can always hope to do better : )