There are four seasons in the game just like in the real world. Each season has certain seed that you can plant during that time period. The season lasts 15 days. Since the spring season has just started, I need to plant the spring seed that I have in stock. I have four Broccoli and one Kale seed. https://www.1up.zone/@darmst5339/dcrops-growing-my-harvest-each-season