How Do Seeds Know When to Germinate?

Seeds can wait for years before sprouting, but they know exactly when to wake up. Imagine you're sleeping in a cozy bed and don't want to get up until the morning. Seeds are like that, they have a kind of clock inside them. This clock helps them count the days and months so they know when it's time to grow into a plant. Some seeds even wait for rain or warmth before they decide to wake up!