Something about getting seeds in the mail in the middle of Winter when it is freezing cold makes Spring seem all that much closer. I now have about eight or nine tomato varieties to pick from and that becomes sort of the basis for targeting the system design.
Seeds are a wonder anyway. I always enjoy getting them started a little early. A few years ago I started growing my seedlings indoors under a GH lamp starting around late April to put out after the chance of frost had ended. Here in the Shenandoah Valley of Virginia, that's around May 16th. In the meantime I'm daydreaming about what the coming system will be like.