In message , Syke
writes
I have two Ceanothus shrubs, the leaves on both of which have turned
completely brown. Are they probably dead, presumably because of the cold,
or is there anything that likely can be done to save them?

Be patient. Many shrubs will produce new shoots from the wood when the
weather warms up, include some which are less hardy than Ceanothus.
--
Stewart Robert Hinsley