Growing Swizzle Series™ Zinnia Garden Seeds
- Taxonomy: Zinnia grandiflora
- Seed Type: Annual
- Sow Indoors or Outdoors: For best results, sow indoors one month before the final frost date then transplant when there are two sets of true leaves, or leave in container for indoor use. For outdoor sowing, plant immediately after final frost date.
- Days to Maturity: 54 - 70 days
- Hardiness Zone: 6 - 11
- Planting Depth: ¼”
- Plant Spacing: 8 - 10"
- Growth Habit: 10 – 12” dwarf shrub with a 6 - 8" spread and a large 4” bloom
- Soil Preference: Normal, loamy, well-drained
- Light Preference: Full sun
- Diseases/Pests/Troubleshooting: As a dwarf plant, Swizzle Series zinnia will compete with more upright plants for sunlight. Also, this variety is most suitable for grow zones 6 – 11, which will leave some northern gardens having to look elsewhere for exotic color. Susceptible to powdery mildew and other leaf diseases. Since they are a dwarf variety, plant far enough apart to allow proper airflow to avoid mildew and mold.
- Color: Ivory and Cherry or Scarlet and Yellow
Swizzle Series zinnia seeds are best sown indoors one month before the final frost date, then transplanted once there are two sets of true leaves. For indoor pot and planter use, sow Swizzle Series zinnia seeds ¼" deep and 8 - 10" apart in average, evenly moist, and well-drained soil with full sun. For outdoor sowing, plant immediately after final frost date into loamy and well-drained soil. Be sure to plant seeds 8 - 10” of each other to ensure proper airflow to minimize mildew and mold. Swizzle Series zinnia seeds mature in 54 - 70 days as 10 – 12” dwarf shrubs 6 - 8" wide with enormous 4" blooms of your choice of either cherry blossom that bleeds into ivory tips, or sunburst yellow with a scarlet center.
Swizzle Series is a hybrid variety of the Zinnia grandiflora created by Kansas State University Research and Extension. University Horticulturists developed and tested the Swizzle Series for two years: measuring the plant's vigor, floriferousness (ability to produce many flowers), and visual impact against the challenging prairie climate. Each year, researchers from KSU introduce dozens of plant hybrids to the public just as vigorous and rewarding as the Swizzle Series.