With our warming climate comes many challenges. But one advantage is the possibility of growing some plants that normally would not thrive in Connecticut. This is true of crepe myrtle. Known as the “lilac of the South,” crepe myrtle has traditionally been successfully grown in zone 7 and warmer climates. But now with new hybrid, sterile, varieties from the National Arboretum and warmer winters, we can grow crepe myrtles in zone 6, and even zone 5, which opens up the possibility in all of Connecticut.
Crepe myrtle varieties come as shrubs or small trees. Choose the right type for your yard to avoid drastic pruning. Some of the best shrub-like crepe myrtles include the 2 foot tall 'Chickasaw' with small purple colored flowers and the 6 foot tall 'Caddo' with bright pink flowers. For small trees, try varieties such as the 10 foot tall 'Tonto' with red flowers and 'Natchez' with pure white flowers on 20 foot tall trees.
Crepe myrtles flower best in full sun on well-drained soil. They bloom in midsummer on new spring growth. Prune in late winter to encourage more growth and flowering, reduce the plant size and improve the structure.
The midsummer flowers are a treat when few other large shrubs and trees are blooming. Also, the bark exfoliates creating an interesting tree for winter viewing.
Crepe myrtle are good city trees because they tolerate pollution. Crepe myrtle has few pest problems other than powdery mildew and fungal leaf diseases during our humid summers. If powdery mildew is an issue in your yard, try growing disease resistant varieties such as 'Caddo', 'Hopi' and 'Tonto'.