Oh! Canada Seeds Giant Mammoth Sunflower Seeds - 300 Pack

Giant Mammoth growth habit with plants reaching 6-12 ft tall and heads up to 18 inches, creating a dramatic garden focal point.

Very large 300-seed pack enables bulk planting for borders, living fences, or expansive plots.

GMO Free and heirloom, open-pollinated lineage supports reliable seed saving for future seasons.

Pollinator and bird friendly, attracting bees for pollination and birds for seed consumption later in the season.

Beginner-friendly with easy-to-follow instructions included on each seed packet to boost germination and growth success.

Outdoor-first design suited for sunny Canadian climates; best performance in gardens rather than containers.

Suitable for diverse planting contexts (survival gardens, urban gardens, meadows) due to high seed quantity and vigor.

Tall plants require ample space and sturdy support; they can be top-heavy and prone to wind damage in exposed areas.

Germination and growth depend on warm soil; older seeds may show reduced germination rates if not stored properly.

Large plants consume significant garden real estate and may shade nearby smaller crops or flowers.

Seed heads attract birds and pests late in the season, potentially reducing harvest if not protected.

Not a dwarf variety; unsuitable for compact balconies or very small patios.