Crape Myrtle Dynamite (1-Gal) This offering is for a 1-Gal sent bare root via USPS Priority Mail. Red blooms Tree Type to 20 feet tall, 4-5 feet wide Wildlife: Attracts Butterflies Full sun to Zones 7-9. Crape Myrtle Dynamite-Upright 20-25 feet + Red blooms.