Dynamite Crape Myrtle

Dynamite Crape Myrtle delivers outstanding ornamental value across three distinct seasons. In summer, massive trusses of ruffled, fiery red flowers cover the tree for weeks at a time, with repeat flushes of bloom continuing through summer into early fall. When the flowers fade, brilliant orange-red fall foliage takes over, transforming the tree into a dramatic autumn specimen. In winter, the smooth, attractively peeling bark in shades of cinnamon and cream is revealed as the leaves fall, providing elegant structure and visual interest in the winter landscape. Few ornamental trees offer this level of sustained, multi-season beauty across such a broad range of growing conditions.

Dynamite Crape Myrtle grows at a moderate rate in an upright habit, reaching 15 to 20 feet tall and 10 to 15 feet wide at maturity. This substantial size makes it most appropriate as a landscape specimen, informal hedge, or street tree rather than a foundation planting near buildings. It develops multiple trunks naturally when grown as a shrub form, or can be trained to a single-trunk tree form by removing lower branches gradually during youth. The upright growth habit provides a naturally tall, vase-like silhouette that frames views and creates vertical structure in the landscape.

Dynamite Crape Myrtle requires full sun with at least 6 to 8 hours of direct sunlight per day for the most prolific blooming and the most vibrant flower color. Full sun also promotes the best mildew resistance by ensuring good air circulation and rapid drying of foliage after rain or irrigation. In shaded or partially shaded conditions, flowering is significantly reduced and susceptibility to powdery mildew increases dramatically. For all landscape uses of crape myrtle — specimen, hedge, street tree — choosing the fullest sun location available is the single most important siting decision.

Water Dynamite Crape Myrtle deeply when the soil is dry during the first growing season to establish an extensive root system. Once established, reduce watering frequency significantly; crape myrtles are excellent drought-tolerant plants that do not require supplemental irrigation in most regions with average rainfall once their roots are well established. During extended drought periods, occasional deep watering helps maintain foliage quality and supports continued blooming. Avoid frequent, shallow watering which promotes shallow root development and reduces long-term drought tolerance.

Dynamite Crape Myrtle thrives in average, well-drained soil and is adaptable to a wide range of soil types from sandy to clay, provided drainage is adequate. It does not require rich, heavily amended soil and performs well even in lean, challenging soils once established. Avoid planting in consistently waterlogged areas. In the landscape, amending planting holes with compost helps with initial establishment, but long-term soil fertility is not a critical factor for crape myrtle performance. The key requirements are adequate drainage, full sun, and sufficient space for the mature dimensions.

• Pruning timing: Thin young trees in late winter to early spring; leave 3 to 7 main trunks or canopy branches for the most attractive multi-trunk form.
• Against "crape murder": Never top or heavily pollard crape myrtles, which destroys their natural elegant form and promotes undesirable, weak regrowth.
• Sucker removal: Remove any suckers that emerge from the base of older established trees as they appear throughout the growing season.
• Fertilizing: Feed in early spring with a balanced fertilizer to support vigorous new growth and prolific summer flowering.
• Deadheading: Remove spent flower trusses promptly after blooming ends to stimulate additional summer bloom cycles.
• Overcast weather note: Prolonged overcast weather can cause red-flowered crape myrtle blooms to fade toward white during extended cloudy periods.

Dynamite Crape Myrtle is an excellent choice as a single specimen plant that serves as a focal point in any landscape. Planted en masse at intervals along a driveway, street, or property boundary, it creates a breathtaking summer color display and effective privacy screening. Its upright growth habit and relatively moderate footprint make it suitable as a small street tree in parking islands and roadside plantings. In the landscape, pair it with low-growing foundation shrubs and perennials to create a layered, multi-season planting that maximizes the tree's year-round visual contributions.

Dynamite Crape Myrtle is rated for USDA Zones 6 through 10. In Zone 6, it is cold hardy to approximately -10 degrees Fahrenheit and may experience occasional dieback of the upper branches during severe winters, but will typically regenerate vigorously from the base or lower branches in spring. In warmer zones through Zone 10, it thrives as a long-lived deciduous tree with reliable year-round performance. Its broader climate adaptability compared to most crape myrtle varieties — the result of deliberate breeding for improved cold hardiness — makes it an outstanding choice across a very wide range of American gardening climates.

Dynamite Crape Myrtle is a product of Carl Whitcomb's breeding program focused specifically on evaluating seedlings from outstanding red cultivars of Lagerstroemia indica, rather than interspecific hybridization. Selections were made for mildew resistance, cold hardiness, drought tolerance, and vivid color, resulting in a series of outstanding introductions with true red or cherry red flowers and extended bloom seasons. Two of the most celebrated are Dynamite (L. indica 'Whit II') with bright, true red flowers, and Red Rocket (L. indica 'Whit IV') with extra-large cherry red trusses. Dynamite remains one of the benchmark red crape myrtle varieties against which all others are measured, prized for the purity and intensity of its flower color. Asexual reproduction of this patented plant is prohibited under the Plant Patent Act.