Brighten flower beds and borders with cheery, brightly colored zinnias. These annuals also look spectacular in fresh floral arrangements. It's easy and economical to start your zinnias from seed. Choose a sunny spot in your flower beds and enjoy zinnia blooms from summer until frost.
Zinnia Seeds for Sale from Gurney's
With our Gardening Guarantee, you can trust that we provide high-quality zinnia seeds. Known for their vibrant blooms and long-lasting flowers, zinnias bring color to gardens and attract pollinators like bees and butterflies.
How to Save Zinnia Seeds
To save zinnia seeds, allow the flowers to fully dry on the plant until the petals turn brown and crisp. Snip off the dried flower heads and store them in a well-ventilated space to dry further. Gently separate the seeds from the petals and chaff. Store the seeds in an airtight bag or glass container in a cool, dry place. When properly stored, zinnia seeds can remain viable for up to 3 years.
How to Plant Zinnia Seeds
Zinnias thrive when directly sown outdoors in warm soil. They can also be started indoors for an earlier bloom time.
Planting Depth: Sow seeds at a depth of ¼ inch.
Spacing: Space seeds 6-12 inches apart, depending on the variety.
Water: Water gently after planting to establish good soil contact without washing away seeds.
When to Start Zinnia Seeds
Direct sow zinnia seeds after the last frost date when soil temperatures reach at least 70°F (21°C). To enjoy continuous blooms, plant seeds in succession every 2-3 weeks through midsummer.
How Long Does It Take for Zinnia Seeds to Germinate?
Zinnia seeds typically germinate within 5-7 days under warm conditions. Ensure soil stays evenly moist for faster germination.
How to Grow Zinnia Plants
To grow zinnias successfully:
- Planting: Direct sow in full sun with well-drained, fertile soil.
- Watering: Keep soil consistently moist but not soggy. Mature plants are drought-tolerant but benefit from regular watering.
- Support: Taller varieties may need staking to prevent flopping.
- Fertilizing: Apply a balanced fertilizer or compost at planting to encourage strong growth and abundant blooms.
- Deadheading: Regularly remove spent flowers to promote continuous blooming.
Zinnias require at least 6-8 hours of full sun daily and bloom from summer until frost. With their fast-growing nature, flowers often appear within 60 days after planting.
Are Zinnias Easy to Grow?
Zinnias are one of the easiest flowers to grow, making them a favorite for both beginner and experienced gardeners. They tolerate heat, bloom prolifically, and thrive with minimal care. As a bonus, zinnias make excellent cut flowers for bouquets.
Common Pests and Issues with Zinnias
- Powdery Mildew: A common fungal disease in humid conditions. Ensure good air circulation and avoid overhead watering.
- Aphids: Tiny pests that suck sap from leaves. Use a strong water spray or insecticidal soap to control infestations.
- Spider Mites: These pests cause yellowing and stippling on leaves. Rinse plants with water and apply neem oil if necessary.
- Japanese Beetles: These insects chew leaves and flowers. Hand-pick them or use traps if needed.
Regular monitoring and proper spacing can help keep zinnias healthy and blooming all season long.
