According to Wikipedia, phenology is the study of periodic events in biological life cycles and how these are influenced by seasonal and interannual variations in climate, as well as habitat factors. The observation of the natural world then links it to when to plant certain crops. For example, when Crocus, Forsythia, Daffodils and Dandelion bloom and when to plant peas, onions, lettuce, beets, Swiss chard, kale, and potatoes. So far, I have seen Crocus, Forsythia, and even the beginnings o ...