Sunflower Seeds – Russian Mammoth

The Russian Mammoth Sunflower is a classic giant variety prized for its towering height and massive, golden-yellow flower heads. Known for its bold presence and bright blooms, this sunflower makes a striking addition to gardens, landscapes, and wildlife areas. It’s an easy-to-grow annual that attracts bees, butterflies, and birds while providing a cheerful summer display. Ideal for garden borders, backdrops, and pollinator-friendly plantings, Russian Mammoth sunflowers are a must-have for gardeners who love tall, dramatic plants.

Features:

• Produces large flower heads up to 12 inches in diameter.

• Grows up to 10–12 feet tall, creating an impressive garden statement.

• Attracts bees, butterflies, and seed-eating birds.

• Excellent for pollinator gardens, naturalized areas, and cut flower arrangements.

• Drought-tolerant once established and easy to maintain.

• Suitable for home gardens, schools, and large-scale landscape projects.

Specifications:

• Scientific Name: Helianthus annuus ‘Russian Mammoth’

• Common Name (US): Sunflower

• Plant Type: Annual

• Bloom Color: Bright Yellow with Brown Center

• Bloom Size: 10–12 inches wide

• Plant Height: 10–12 feet

• Sunlight Requirement: Full Sun

• Soil Type: Well-drained, moderately fertile soil

• Watering: Moderate; water regularly but avoid waterlogging

• Germination Time: 7–14 days

• Days to Bloom: 80–100 days after sowing

• Sowing Method: Direct sow outdoors after the last frost

• Spacing: 18–24 inches 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, borders, wildlife gardens, and decorative displays