I actually figured out why it is so wrong for me. When you plug in your zip code, it goes to the nearest (I suppose) weather station that tracks planting times. For me, that is Mount Vernon up in the Skagit Valley, which is much more protected from Puget Sound than I am. I have learned instead to plug in an Everett zip code which is closer to my micro-climate. I think once you pinpoint your 'best fit' this is a really nice feature.