Zinnia elegans

Short (8-12 inches)

• ‘Dreamland’ Series
• ‘Magellan’ Series
• ‘Short Stuff’ Series
• ‘Thumbelina’ Series

Medium (14-18 inches)

• ‘Bridesmaid’
• White Wedding’
• ‘Champagne Toast’
• ‘Lilliput’ Mix

Tall (2-3 feet)

• ‘State Fair’
• ‘Zowie Yellow Flame’
• ‘Giant’ Series
• ‘Oklahoma’ Series

Zinnia angustifolia

• ‘Profusion Double’ Series
• ‘Profusion Knee High’ Series

Zinnia marylandica

• ‘Zahara’ Series
• ‘Uptown’ Series
• ‘Double Zahara’ Series

Bacterial Disease

• Bacterial Leaf Spot (Pseudomonas spp. & Xanthomonas spp.)

Environmental Damage

• Drought
• Drowning and Edema

Fungal Disease

• Gray Mold [Annuals and Herbaceous Perennials] (Botrytis cinerea & paeoniae)
• Powdery Mildew [Annuals and Herbaceous Perennials] (Many genus and species involved)

Insect Damage

• Aphids (Aphididae)

Additional pests and problems that may affect this plant:

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.