Sunflower Seeds - Mammoth

Mammoth Sunflower Seeds are a popular choice for home gardeners who enjoy bold and impressive blooms. Known for their towering height and large, bright yellow flower heads, these sunflowers add a striking presence to gardens and landscapes. Easy to grow and resilient, they make an excellent option for both beginner and experienced gardeners.

Features:

• Produces extra-large yellow flower heads with sturdy stalks

• Can grow up to 12 feet tall under ideal conditions

• Attracts pollinators, enhancing the overall health of your garden

• Suitable for ornamental garden use, borders, and background planting

• Strong stems provide natural support for the oversized blooms

Specifications:

• Common Name (US): Sunflower Seeds

• Variety: Mammoth

• Plant Type: Annual

• Season: Best sown in spring after the last frost

• Sunlight: Full sun required for optimal growth

• Soil: Well-drained, fertile soil

• USDA Zones: 2–11

• Planting Months by Zone:

  • Zones 2–6: April to May

  • Zones 7–9: March to April

  • Zones 10–11: February to March

• Days to Germination: 7–10 days

• Days to Bloom: 75–90 days after sowing

• Plant Height: Up to 10–12 feet tall

• Spacing: 18–24 inches apart