We are receiving a few calls about birch trees dropping leaves. It can be a little alarming as they can drop 50% of all their leaves pretty quickly.
But there is no need to worry since this is the birch tree’s natural self defence mechanism to deal with drought stress. In an effort to reduce water loss the tree sheds excess leaves to minimize the amount of water lost through evapotranspiration ( through the leaf).
If we continue with a prolonged dry spell a deep soaking with a slow trickling garden hose once a week will help.