This time of the year deciduous trees (drop their leaves) are starting to go into dormancy. Crape Myrtles are one of those. The leaves will be turning brownish yellow or reddish and will be starting to drop to the ground. This is perfectly normal as the trees move from fall into winter dormancy. PLEASE DO NOT TRIM your Crape Myrtle until late January or early February though! The warm fall temperatures will allow the tree to flush out again and then can suffer damage if we have freezing temperatures occur. When you do trim it, remember NO CRAPE MURDER!