Short (8-12 inches)
Medium (14-18 inches)
Tall (2-3 feet)
Additional pests and problems that may affect this plant:Powdery mildew, xanthomonas leaf spot, botrytis, alternaria leaf spot, cercospora leaf spot
For dependable, low maintenance zinnias resistant to powdery mildew, consider using Zinnia angustifolia cultivars. They produce numerous single flowers on compact spreading plants. They include: 'Crystal White' 10-14 inches tall, white flowers; Crystal Orange 10-14 inches tall, orange flowers; 'Star Orange' 10-14 inches tall, orange flowers; 'Star White' 10-14 inches tall , white flowers. The 'Profusion' Series, Zinnia hybrida also are excellent choices for disease tolerant zinnias.
Deadhead for continuous bloom.