Giant Mammoth Russian “Grey Stripe” Sunflower Seeds (Helianthus annuus) Huge 10” Flower Heads

Giant Mammoth Russian “Grey Stripe” Sunflower Seeds (Helianthus annuus)

The Helianthus annuus ‘Mammoth Grey Stripe’ is a classic heirloom giant sunflower variety famous for its enormous flower heads, towering height, and large edible striped seeds. This fast-growing annual makes a dramatic statement in gardens, meadows, wildlife plantings, and children’s gardens with blooms that can reach up to 10 inches across atop impressive stalks growing 8–12 feet tall.

Massive golden-yellow flowers with dark centers attract bees, butterflies, hummingbirds, and other pollinators throughout the summer season. As the flower heads mature, they produce abundant large grey-striped sunflower seeds that are excellent for roasting, snacking, wildlife feeding, or leaving on the stalks for birds to enjoy naturally.

This open-pollinated heirloom sunflower is easy to grow and thrives in full sun locations with loose, well-draining soil. Due to its height, planting near fences, walls, or sheltered locations is recommended to protect plants from strong winds.

Mammoth Grey Stripe Sunflowers are widely loved for their impressive size, rapid growth, pollinator value, edible seeds, and cheerful appearance in both ornamental and productive gardens.

🌱 Growing & Care Information

Light: Full sun
Soil: Loose, well-draining soil
Water: Moderate moisture during active growth
Growth: Fast-growing annual giant sunflower
Climate: Adaptable to a wide range of climates

Direct sowing outdoors after danger of frost has passed is recommended, as sunflowers develop long taproots that prefer undisturbed growth.

🌿 Why Grow Mammoth Grey Stripe Sunflowers?

• Huge 10-inch golden flower heads
• Towering 8–12 foot tall plants
• Produces large edible striped sunflower seeds
• Excellent pollinator and bird-friendly plant
• Easy fast-growing heirloom variety
• Great natural privacy screen or backdrop
• Perfect for children’s gardens and meadows
• Beautiful ornamental and wildlife sunflower

USDA Hardiness Zones: 2–11

Mammoth Sunflower Germination:

1) Soak seeds in water for 6 hours.

2) Place seeds inside of a wet paper towel, and place inside of a zip lock bag.

3) Place the zip lock bag on top of a heated propagator mat to keep the temperature between 75-80 degrees F at all times.

4) Expect germination between 7-10 days, with some germinating much earlier.

"Please Contact us First if You Need Anything"

Germinación del girasol gigante (Mammoth):

1) Remoje las semillas en agua durante 6 horas.

2) Coloque las semillas dentro de una toalla de papel húmeda e introdúzcalas en una bolsa con cierre hermético (tipo Ziploc).

3) Coloque la bolsa sobre una manta térmica de propagación para mantener la temperatura entre 75 y 80 grados Fahrenheit en todo momento.

4) Espere la germinación entre 7 y 10 días, aunque algunas germinarán mucho antes.

"Por favor, contáctenos primero si necesita algo."