Plant phenology, or the timing of plant life cycle events, is influenced by precipitation changes. A study analyzed data from 63 experiments and found that early-season plant events like leaf out and flowering happen earlier with more rain, while late-season events like leaf color change occur later. This leads to longer growing seasons with more rain. Conversely, less rain causes delayed leaf out and earlier leaf color change, shortening the growing season. The effects are more pronounced in drier regions and vary depending on when the precipitation changes occur. Understanding these patterns can help predict how plants will respond to future changes in precipitation and improve phenological models.