Zinnia Seeds,
Purple Prince

Plant Purple Prince zinnia seeds after the last frost when the soil has warmed to about 75 F. This variety thrives in USDA zones 3-10 and performs best when sown in late spring. In areas with long growing seasons, you can plant in succession every few weeks to extend the flowering period into the fall. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

Directly sow seeds in a sunny location, planting them about 1/4 inch deep. Space plants 9-12 inches apart for good air circulation, which helps prevent mildew. For an early start, seeds can be sown indoors about 4 weeks before the last frost and transplanted outdoors when temperatures stabilize. If starting indoors, use biodegradable pots or other means to minimize root disturbance when transplanting​.

Purple Prince zinnia requires full sun and regular watering, allowing the soil to dry out slightly between waterings to avoid root rot. Fertilize with a balanced, all-purpose fertilizer monthly to boost growth and blooms. Cut frequently or remove spent flowers for the highest production.

• Allow the flowerhead containing the seeds to mature and dry on the plant.
• Clip off the flowerhead and place it in a paper bag or other container.
• Working over the top of another clean, opened container, rub the flowerheads between the palms to break them apart.
• The seeds can be separated from the chaff by first screening and then winnowing.
• Store in a cool, dry, dark place over winter.