Flying Colors Coral Diascia (Diascia ‘Diastis’ Flying Colors Coral) This snapdragon cousin stages a strong show during the cool seasons—fall, winter and spring. Plant whenever you see plants for sale. When night temperatures shift above 70°F, plants stop flowering. Trim plants and keep them watered through summer. You might be surprised with autumn blooms. Landscape use: Plant in containers, hanging baskets or window boxes. Use in landscape beds for a carpet of color.