Double Dynamite Red Crape Myrtle TreesDouble Dynamite Red Crape Myrtle Trees for Sale Online The Red flowering Double Dynamite Crape Myrtle Trees are an exciting new Crape Myrtle hybrid that has the darkest purple leaves that we've seen on any Crape Myrtle. Intense cherry red, sterile flower clusters won't produce seeds, so there's no need to worry about unwanted seedlings popping up around your yard. As the foliage ages during the summer, it becomes a dark green color.