Giant Mammoth Sunflower Seeds Extra Tall Sunflowers Open Pollinated Fast Growing High Germination Heirloom

Giant Mammoth Grey Stripe Sunflower Seeds (Helianthus annuus) • Extra Tall Sunflowers Mammoth Russian • Heirloom Seeds • Bee & Pollinator Friendly • Fast Growing Garden Flowers • Easy to Grow • Kids Gardening

Create a stunning statement in your garden with Giant Mammoth Sunflower Seeds — one of the tallest and most iconic sunflower varieties! These heirloom sunflowers grow up to 8–12+ feet tall, producing huge golden blooms that brighten any backyard, pollinator garden, or summer landscape.

Perfect for bee butterfly friendly gardens, kids gardening projects, homestead gardens, or anyone who loves bold, easy-to-grow flowers. These sunflowers thrive in full sun and are one of the most rewarding flowers to grow from seed — fast-growing, low-maintenance, and visually spectacular.

Great for borders, fences, along houses, and creating natural privacy screens.

✨ Features

Heirloom giant sunflower

Grows extremely tall: 8–12+ feet

Produces huge yellow blooms

Easy to grow from seed — great for beginners and kids

Excellent for pollinator gardens (attract bees & butterflies)

Fast-growing summer flower

Beautiful cut flower option

Ideal for backyard gardens, homesteads, farms, and school garden projects

🌱 How to Grow

Germination time: 10-15 days
Harvest Time: 70-80 days
USDA zone: 3-10
Plant Height: 72-144 inch ( 183cm-366cm)
Planting Depth: 1/4-1/2 in (0.6-1.3cm)
Life cycle: Annual

Direct sowing outdoors
Sow outdoors after frost
Choose a sunny, well-draining location and sow the seeds at a depth of 1/2 inch, spacing them about 2-4 feet apart.
Plant in full sun
Thoroughly water the planted area and maintain consistent moisture until germination(usually occurring within 7-14 days).
Staking my be necessary for these tall plants in windy area.


🎁 Perfect For

Pollinator garden

Bee & butterfly-friendly garden

Backyard landscaping

Homestead gardening

Summer flower beds

Kids gardening & school projects

Heirloom seed collectors

Fast-growing flower gardens