Many plants, including the crape myrtle, will have reduced flowering if fertilized with high rates of nitrogen, so go lightly. High salt content in the soils might cause problems with marginal leaf burn. An occasional leaching with large quantities of water will help to reduce this condition. Lagerstroemia should be placed in the landscape where plenty of light is available. Eastern, southern or open exposures are best.
Western exposures are difficult for the plant, particularly in desert regions.
Shade may predispose plants to problems with powdery mildew, especially in zones where this malady is prevalent. The cultivars named after Indian tribes are considered mildew resistant. The U.S. National Arboretum from a cross between L. indica and the lesser-known L. fauriei developed these plants. Check out the hybrids 'Catawba', 'Cherokee', 'Pecos', 'Seminole' and 'Zuni'. With so much color to offer and very little care required, the crape myrtle is a perfect match for the summer landscape.