evergreen

A plant that retains its leaves throughout the year, maintaining a continuous canopy across all seasons.

Evergreen tree species provide continuous shade, year-round photosynthesis, and persistent habitat for wildlife. Their leaf retention strategy suits environments where the cost of regrowing leaves each season exceeds the cost of maintaining them through unfavorable periods.

Conifers like pine and spruce dominate cold-climate evergreen forests. In the tropics, most broadleaf species are naturally evergreen due to the absence of a cold dormancy trigger. Evergreen hedges and windbreaks serve practical roles in permaculture design by providing persistent structure.

Leaf longevity in evergreens ranges from one to several years, with older leaves shed gradually and replaced by new growth.

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