Buddleja asiatica | Dogtail | 100 SEEDS - Dogtail | Asian butterfly bush Buddleja asiatica seeds grow into a stunning Asian butterfly bush known for its delicate charm and vibrant floral display. People often call it the Dogtail for its distinctive, tail-like blooms that attract butterflies and other pollinators, enhancing any garden space.The Buddleja asiatica Dogtail produces soft, lush foliage and flowers ranging from pale lilac to deep purple shades.