Zinnia Seeds,
Dream Deep Rosy Lavender

Zinnias are best planted after the last frost when soil temperatures reach at least 60°F. In regions with shorter growing seasons, you can also start seeds indoors about 4 weeks before the final frost date. In warmer climates, you can directly sow outdoors in late spring and even continue with successive sowings for a continual display throughout summer. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

Sow seeds about ¼ inch deep, spaced 9 to 12 inches apart to improve airflow, essential for disease prevention. Seeds typically germinate in 4 to 6 days, in soil temperature of between 75 to 80°F. If planting in trays, make sure that the soil remains moist but not waterlogged and use biodegradable pots or other means to minimize root disturbance when transplanting​.

Water deeply, allowing the soil to dry slightly between waterings, as zinnias tolerate brief dry spells. Apply mulch around plants to retain moisture and reduce weeds. Pinching the top growth of young plants encourages bushier growth, which can help plants support each other and reduce the need for staking.

• 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.