Sow Right Seeds Mammoth Sunflower Seeds - Grow Giant Sunflowers (8-12 ft), Non-GMO Heirloom

Turn Your Garden into a Sunlit Giant with Mammoth Sunflowers

Sow Right Seeds presents Mammoth Sunflower seeds, a lush, heirloom option that champions tall, sunny blooms and enduring garden value. These open-pollinated, non-GMO seeds are chosen for their reliability, potential for seed-saving year after year, and the dramatic impact they bring to any outdoor space. The plant’s bold presence creates an instant focal point, whether used as a border statement, a backdrop for other perennials, or a striking cut-flower accent inside your home.

What to Expect from Mammoth Sunflowers

• Impressive height and silhouette: expect plants to reach 8–12 ft tall with a 2–3 ft spread, delivering a striking garden feature.
• Clear growth timeline: seeds germinate in about 7–14 days in warm soil and reach maturity in roughly 80–90 days, depending on climate.
• Pollinator and wildlife appeal: large, bright yellow blooms attract bees, while dried seeds invite visiting birds later in the season.
• Easy-to-grow goodness: simple planting depth (1 inch) and spacing (about 3 feet) with included growing instructions; open-pollinated seeds can be saved for the next season.
• Ethical and sustainable: the brand operates with solar power and upholds the Safe Seed Pledge to provide fresh, heirloom stock.

Garden and Harvest Tips

• Plant in full sun for best stalk strength and bloom color; space plants to accommodate their wide growth habit.
• In zones 3–9, these sunflowers typically perform well and bring a robust, drought-tolerant look to the garden.
• Each packet contains a minimum of 8 g (approximately 70–80 seeds), offering multiple growing opportunities from a single purchase.

Whether you’re designing a dramatic entryway border, a sunny courtyard, or a pollinator-friendly patch, Mammoth Sunflowers offer a rewarding, seasonal display. Consider harvesting some seeds for roasting or sharing with friends—it's a satisfying reminder of garden-to-table pleasures. While results can vary by conditions, this variety is celebrated for its vigor, reliability, and long-lasting garden presence.