Sunflower ‘Stellarsun’ F1 Hybrid Seeds

Sunflower ‘Stellarsun’ F1 Hybrid Seeds

Botanical Name: Helianthus annuus

• Premium pollen-free sunflower with rich golden-yellow petals.
• Dark central disc creates a striking contrast in arrangements.
• Flowers quickly—ready in just 6–7 weeks from planting.
• Excellent vase life for floristry and cut flower markets.
• Uniform plants grow to around 150 cm tall.
• Strong stems provide reliable support for large blooms.
• Best sown from spring through early autumn in full sun.

Plant Details:

• Plant Type: Warm-season annual
• Plant Height: Approx. 150 cm
• Flower Size: Medium–large golden blooms
• Pollen: Pollen-free

Sowing Information:

• Sow When:
  • Temperate: September–January
  • Subtropical: August–February
  • Tropical: March–September (avoid peak wet)
  • Cool: October–December
  • Arid: September–January (with irrigation)
• Germination: 7–10 days @ 18–25°C
• Depth: 10–15 mm
• Position: Full sun
• Sow Where: Direct sow—taproot resents disturbance
• Soil Type: Fertile, well-drained soil enriched with compost
• Spacing: 30–40 cm between plants; rows 60–75 cm apart

Growing Tips:

• Apply deep watering at longer intervals to support taproot growth.
• Stagger plantings every 2–3 weeks for continuous flowering.
• Protect seedlings from birds and snails during early growth.
• Mulch well to conserve soil moisture and suppress weeds.
• Cut stems when petals just begin to open for best vase life.

Harvest:

Begin harvesting 6–7 weeks after sowing. Harvest when the first petals unfurl for cut flowers, or allow some heads to mature for birds and pollinators.

When to Sow Sunflower ‘Stellarsun’ in Your Climate