I live in zone 8b in the Willamette Valley, OR. The buds on many of my deciduous trees (Hawthhorn, Maple, and quince) were starting to swell. Most of my trees are in turface, pine bark, granite mixture (some have some lava). I got spring fever and fertilized with some of the slow release Osomocote 14-14-14 yesterday. Did I mess up?? Last frost date is about May 15. Should have I waited for the leaves to harden off??