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Why are most conifers evergreen?

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Gymnosperm Pine cone and exposed seeds of the pinyon pine (*Pinus edulis*). Pinyon pines are gymnosperms and bear their edible seeds, known as pine nuts, in protective cones instead of fruit.

Most conifers are evergreen, meaning they retain their leaves throughout the year and into the following growing season, rather than shedding them annually like deciduous trees.12

This adaptation is primarily a strategy for survival in environments where conditions for growth may be limited. Conifer leaves are specialized to minimize water loss, often featuring a thick, waxy, waterproof coating and sunken stomates that protect the plant from dry air. By retaining their foliage, these trees can begin photosynthesis as soon as temperatures are favorable, without the metabolic cost of producing an entirely new set of leaves each spring.314

While most conifers are evergreen, it is important to note that this is not a universal trait for the group. Certain species, such as larch, bald cypress, and dawn redwood, are deciduous and shed their leaves annually.24