HELIANTHUS – Sol Red

Growing Temp 60°F – 75°F
Days to Maturity 70-80 days

Ease of Cultivation and uses: The ‘Red Sun’ sunflower is a striking variety known for its rich, dark red to maroon petals surrounding a dark center. This sunflower is relatively easy to grow, making it suitable for both novice and experienced gardeners. It thrives in full sun and adapts well to various soil types, making it a versatile addition to gardens and landscapes. The beautiful blooms not only add a dramatic touch to floral arrangements but also attract pollinators and beneficial insects, enhancing the overall health of your garden.

Direct Sowing: For direct sowing, plant ‘Red Sun’ sunflower seeds outdoors in the spring after the last frost date when the soil temperature is at least 60°F. Sow the seeds 1 inch deep and space them 18–24 inches apart in rows that are 2–3 feet apart. Water the seeds thoroughly after planting and keep the soil consistently moist until germination, which typically occurs within 7–10 days. Once established, these sunflowers are drought-tolerant and require minimal maintenance.

Early Sowing for Seedlings: To start early, sow sunflower seeds indoors 4–6 weeks before the last expected frost. Use seedling trays filled with quality potting mix, placing one seed per cell and covering lightly with soil. Maintain a temperature of around 70°F to encourage germination. Once the seedlings develop their first true leaves and the danger of frost has passed, transplant them into the garden, spacing them 18–24 inches apart. Water them well after planting to help establish their roots.

Harvesting: To determine when ‘Red Sun’ sunflowers are ready to harvest, look for the flower heads to droop and the backs to turn brown. This indicates that the seeds are mature. Cut the flower heads in the morning when they are dry, leaving several inches of stem for handling. If you wish to collect seeds, allow the heads to dry completely, or cover them with a paper bag to protect them from birds and pests until you are ready to harvest.