Why Evergreens Stay Green

Not every tree puts on a show. Pines, spruces and firs stay green all winter.

Their needles are tough and covered in a waxy coating that helps them survive cold weather and hold on to water.

Evergreens do still drop old needles, but they do it gradually rather than all at once.

That is why they stay green while the trees around them turn gold and red, and then bare.