That is what my mom would say, years ago, when I lived in New Jersey as a child. "Spring has sprung!" By then the last of winter's snow had melted away and crocus buds were beginning to unfurl in the lawn, as the grass came back to life. Purple, yellow, white, sometimes striped and always with a little orange bit in the middle. The bit that, I have since learned, is where the world's most expensive spice comes from: saffron.