Osteospermum ‘Zion Purple Sun’ is a vibrant and popular flowering plant that can add striking color to any garden space. Its distinctive purple and orange blooms make it a favored choice for gardeners seeking to introduce visual interest. This article will guide you through the process of cultivating this specific plant from seeds, helping you achieve a flourishing display.
Understanding Osteospermum ‘Zion Purple Sun’
Osteospermum ‘Zion Purple Sun’ is a variety of African Daisy, scientifically known as Osteospermum ecklonis. This plant is admired for its unique color combination, featuring large, impressive daisy-like flowers with shades of orange that transition into a deep purple ring surrounding the center. The plant typically exhibits an upright or mounded growth habit, reaching heights of 16 to 20 inches and spreading 16 to 24 inches. While it is technically a tender perennial in warmer climates (USDA Zones 9-11), it is often grown as an annual in cooler regions due to its sensitivity to frost.
Starting Osteospermum ‘Zion Purple Sun’ Seeds
Starting Osteospermum ‘Zion Purple Sun’ seeds indoors is recommended 6 to 8 weeks before the last expected frost date. This allows seedlings to develop sufficiently before outdoor transplanting. Gather a sterile seed-starting mix, seed trays or small pots, and a reliable light source.
Osteospermum seeds require light for germination. Sprinkle them on the surface of moist seed-starting mix and lightly cover with a thin layer of soil or vermiculite, about 1/16 inch deep. Keep the soil consistently moist but not waterlogged; excessive moisture hinders germination.
The ideal germination temperature ranges between 60°F and 70°F. Germination typically occurs within 10 to 21 days.
Caring for Seedlings and Young Plants
Once Osteospermum ‘Zion Purple Sun’ seeds germinate, provide adequate light for healthy seedling development. For indoor seedlings, use grow lights to ensure sufficient illumination, as they prefer a cool, well-lit environment. Keep the soil moist but avoid oversaturation, which can lead to root issues.
When seedlings reach 2 to 3 inches, transplant them into individual pots to continue growing until the last frost has passed. Thinning seedlings is necessary to ensure proper spacing and air circulation, promoting stronger growth. Before moving young plants outdoors, harden them off for 7 to 14 days. This involves gradually exposing them to outdoor conditions, preparing them for the garden environment.
Ongoing Care for Established Plants
Once established, Osteospermum ‘Zion Purple Sun’ plants thrive in full sun, needing at least six hours of direct sunlight daily for optimal blooming. While they tolerate various soil types, well-draining soil is preferred. Amend heavy clay soil with organic matter to improve drainage.
These plants have moderate watering needs; water deeply when the top inch of soil feels dry, but avoid standing water, as they do not tolerate soggy conditions. Regular fertilization supports continuous blooming throughout the growing season. A balanced, slow-release fertilizer in spring, followed by a water-soluble fertilizer every 4 to 6 weeks, is beneficial.
Deadheading spent blooms encourages more flowers, extending the blooming period from early summer to mid-fall. Osteospermum ‘Zion Purple Sun’ is resistant to most pests and diseases. Occasional issues like aphids or fungal problems in damp conditions can be managed with appropriate care.