When it comes to a change in seasons, there are always signs that herald the season much more than any date on the calendar. In autumn, we look for falling leaves and that kiss of briskness in the air. In winter, it’s the first hard frost and the quiet sleep that falls over your garden and the critters who live there. You know it’s summer by those first days of low heat that make you feel like you’re being pushed right into the sidewalk, the smell of gardens in full bloom, and the wild abandon of so many birds and wild creatures now in full flourish. But spring is more subtle.