Zinnia Seeds,
Oklahoma Pink

Zinnia seeds should be planted after the last frost. In areas with shorter growing seasons, starting seeds indoors about 4 weeks before the last expected frost is recommended. The plants will typically mature in about 70 days. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

Direct sow seeds ¼ inch deep, spacing them 9 to 12 inches apart to allow for adequate airflow, reducing the risk of powdery mildew. Indoor starts can be transplanted outdoors once they have developed two sets of true leaves and all danger of frost has passed. Use biodegradable pots or other means to minimize root disturbance when transplanting​. Germination usually takes 4 to 6 days in warm soil, ideally between 75 to 80°F.

Water young plants thoroughly once or twice a week and allow the soil to dry slightly between waterings. Mature plants are drought-tolerant but benefit from consistent watering during extended dry periods. Apply a balanced, slow-release fertilizer at the start of the season to promote blooming, and mulch around plants to help retain soil moisture.

• 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.