Something Wild: Cold snap? Just ask the rhododendron!
A phenomenon called "thermonasty" causes rhododendron leaves to curl up when it’s really cold, allowing this broad-leaved evergreen to thrive in damp soil and freezing temperatures.
A phenomenon called "thermonasty" causes rhododendron leaves to curl up when it’s really cold, allowing this broad-leaved evergreen to thrive in damp soil and freezing temperatures.