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Zinnia Seeds
Zinnia Seeds, Redman Super Cactus
Description
(Zinnia elegans). Magnificent, huge red-flowered variety of the giant cactus-type zinnia family. These flowers are stately, being a deep red and having pointed cactus-type petals. An old favorite that has now become rare.
- Annual
- 70 days to maturity
- 8-12 hours of full sun
- Sprouts in 4-6 days
- Seed Depth: 1/4"
- Plant Spacing: 9-12"
- Ideal Temperature: 70-95 F
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Redman Super Cactus zinnia is an heirloom variety that grows best planted in well-draining, nutrient-rich soil, in a location that receives full sun. Cut frequently or remove spent flowers for the highest production. Additionally, spacing the plants well promotes air circulation, helping to prevent diseases like powdery mildew.
When to Grow
Plant seeds after the last frost date for your region, usually in late spring. Alternatively, you can start seeds indoors about 4 weeks before the last expected frost and transplant them once the soil has warmed up. Zinnias are highly sensitive to frost, so planting at the right time is essential.
How to Sow and Plant
Sow seeds 1/4 inch deep, and keep the soil moist until germination, which typically takes 4-6 days. Space seedlings 9-12 inches apart to allow proper growth and airflow. This spacing is very important to prevent common fungal issues, such as powdery mildew. Mulching around the base can help retain soil moisture and reduce weed growth. If starting indoors, use biodegradable pots or other means to minimize root disturbance when transplanting​.
How to Grow
Redman Super Cactus zinnia requires full sun and moderate watering, especially during dry periods. Light fertilization throughout the growing season can improve flower production. Pinching the first buds encourages bushier growth and a higher yield of flowers.
How to Save
- 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.
FAQ
How tall does Redman Super Cactus zinnia grow?
These plants typically reach heights of 30-36 inches, making them great for adding height and a pop of color to gardens.
Are Redman Super Cactus zinnias good for cutting gardens?
Yes, the large blooms and sturdy stems make them excellent for cut flowers, with new blooms continually replacing those that are harvested.
Do Redman Super Cactus zinnias attract pollinators?
Yes, they attract bees and butterflies, making them a great choice for pollinator-friendly gardens.
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