Evergreen trees maintain their green color year-round thanks to several unique adaptations:
- Special needle structure with waxy coating to prevent water loss
- Continuous chlorophyll production throughout the year
- Gradual needle replacement rather than all at once
Unlike deciduous trees, evergreens have evolved to protect their leaves from winter damage and continue photosynthesis when conditions allow. They typically drop and replace their needles gradually over 2-5 years, ensuring they always maintain some green foliage. This strategy allows them to photosynthesize whenever conditions are favorable, even during winter months.