Sunflower Seeds – Mongolian Giant

The Mongolian Giant Sunflower is a remarkable variety known for its massive size and impressive height. These striking sunflowers can grow up to 12–14 feet tall with large golden-yellow blooms reaching over a foot in diameter. Perfect for adding a dramatic touch to gardens, landscapes, and borders, this variety is also a great choice for producing edible seeds. Easy to grow and resilient, the Mongolian Giant thrives in full sun and well-drained soil, making it ideal for gardeners seeking both beauty and productivity.

Features:

• Grows exceptionally tall, often reaching 12–14 feet.

• Produces huge, bright yellow flower heads up to 12–16 inches wide.

• Excellent for pollinator attraction and seed production.

• Strong, thick stems provide good wind resistance.

• Perfect for garden borders, backdrops, and ornamental displays.

• Easy to grow from seed with minimal care requirements.

Specifications:

• Scientific Name: Helianthus annuus ‘Mongolian Giant’

• Common Name (US): Sunflower

• Plant Type: Annual

• Bloom Color: Bright Yellow

• Bloom Size: 12–16 inches (30–40 cm)

• Plant Height: 12–14 feet (3.6–4.2 meters)

• Sunlight Requirement: Full Sun

• Soil Type: Well-drained, nutrient-rich soil

• Watering: Regular watering, avoid overwatering

• Germination Time: 7–10 days

• Days to Maturity: 90–110 days

• Sowing Method: Direct sow outdoors after last frost

• Spacing: 18–24 inches apart

• Row Spacing: 2–3 feet apart

• Growing Season: Spring to Summer

• USDA Hardiness Zones: 2–11 (grown as annual in all zones)

• Best Planting Months (by Zone):

  • Zones 2–5: May to June

  • Zones 6–9: April to May

  • Zones 10–11: February to March

• Use: Garden backdrops, decorative displays, seed production, pollinator attraction