- Species and varieties: Zinnia elegans, commonly known as Zinnia, is a popular flowering plant species. The 'Giant Red' variety is known for its large, vibrant red blooms that can reach up to 4-5 inches in diameter. This variety is part of the Zinnia elegans species, which includes many other color variations and sizes.
- Hybrid or heirloom: The 'Giant Red' Zinnia is typically an heirloom variety, meaning it has been passed down through generations without significant genetic modification. Heirloom seeds are valued for their genetic diversity and historical significance.
- Pruning and training: Zinnias do not require extensive pruning, but deadheading (removing spent flowers) can encourage continuous blooming and prevent the plant from going to seed too early. Pinching back the stems when the plants are young can promote bushier growth.
- Fertilization needs: Zinnias benefit from a balanced, all-purpose fertilizer applied at planting time. Additional feeding with a water-soluble fertilizer every 4-6 weeks can support vigorous growth and abundant flowering. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers.
- Hardiness zones: Zinnias are best suited for USDA hardiness zones 3-10. They thrive in warm climates and are not frost-tolerant.
- Climate requirements: Zinnias prefer full sun and well-drained soil. They require a warm climate with temperatures ranging between 70-85°F (21-29°C) for optimal growth. They can tolerate heat but need protection from frost.