Do silver birch trees lose their leaves in winter?
Just so, do birch trees lose their leaves early?
Trees lose a lot of moisture through their leaves via evaporation, and letting them fall early means they'll be able to retain more water and have a fighting chance to survive in periods when less water is available. This means it'll come back in spring.
Correspondingly, why is my birch tree losing its leaves?
In the summer, when the water is limited, they'll drop leaves if they get thirsty enough. To remedy, deeply water your birch tree each week, and add mulch to conserve moisture. How hot is it? If it gets too hot for too long, these trees drop leaves to conserve energy.
The tell-tale sign of a dying birch tree is the wilting and dying of foliage from the crown, or top of the tree, along with D-shaped insect exit holes in the bark. Once these symptoms are visible, the tree will continue to decline, even if treated.