Light reflected from plant canopies carries detailed information about how ecosystems function. In this study, we focus on pigments—like chlorophylls and xanthophylls—that help regulate photosynthesis and protect leaves from stress. These pigments change over days to weeks, but many remote sensing tools (like satellites or airplanes) only capture snapshots too infrequently to track those dynamics. We used hyperspectral sensors mounted on a tower in a temperate evergreen forest to measure pigment variability within and across seasons. Our results show that canopy pigment pools can be predicted well from reflected light, even at fine spatial and temporal scales. These findings help connect field-based measurements with larger-scale airborne and satellite data, improving our ability to monitor forest function, phenology, and stress over time.