Giant Purple Zinnia is a showstopping cultivar of Zinnia elegans that reaches an impressive 40 to 50 inches tall, producing deep purple blooms that command attention in any garden. Hardy in zones 2 through 11, this frost-tender annual thrives in full sun and moderate water, rewarding gardeners with bold color from summer through fall. Growing these giants requires patience and warmth; seeds germinate best at 70 to 80 degrees Fahrenheit, and they genuinely prefer waiting for truly warm soil rather than early planting.
Full Sun
Moderate
2-11
50in H x ?in W
—
Moderate
Hover over chart points for details
This variety towers above typical zinnias at 40 to 50 inches, with the rich purple flowers that give it its name. Seeds started indoors 4 to 6 weeks before your last frost date will be ready to transplant once soil warms, though these plants show no benefit from being rushed into cold ground. The color deepens and intensifies as summer progresses, creating dramatic vertical interest in cutting gardens and borders.
Giant Purple Zinnias are grown as cut flowers, prized for their tall stems and commanding presence in arrangements. The large blooms and sturdy growth habit suit them to garden backdrops, mixed borders, and containers where their height can be showcased. They're excellent for adding vertical structure to flower beds and for supplying fresh bouquets throughout the growing season.
No timeline data available yet for this variety.
Start seeds indoors 4 to 6 weeks before your average last frost date. Keep soil warm between 70 and 80 degrees Fahrenheit for best germination. Transplant outdoors only after your average last frost date has passed and soil has warmed; zinnias do not benefit from being planted early.
Transplant seedlings outdoors after your average last frost date when soil has warmed. Space transplants 12 inches apart to allow for their mature height and spread.
Direct sow outdoors 1 to 2 weeks after your average last frost date, once soil has warmed. Zinnias can also be sown directly where they'll grow, though starting indoors gives earlier blooms.
Cut flowers for arrangements once blooms have fully opened and petals are firm. Regular harvesting encourages more flower production throughout the season. Cut stems in the early morning when plants are fully hydrated for longest vase life.
Enter your ZIP code to see a personalized growing calendar for this plant.