If you are seeing brown leaves on your crepe myrtle plant in the spring, it could be due to your area experiencing a cold snap. Crepe myrtle is not as tolerant of cold weather as many bushes are.

Ask It/Solve It - Crepe myrtle | Frangipani leaf. Josh identifies a wind damaged crepe myrtle and Sophie helps with a mite problem. 3 of 5. Corn and Co.