Sunflower, Mammoth Organic Seeds

Helianthus annuus

Regular price $3.49
Regular price Sale price $3.49
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Sunflower, Mammoth Organic Seeds

Helianthus annuus

Regular price $3.49
Regular price Sale price $3.49
Sale Sold out

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The Mammoth Sunflower is an easy-to-grow summer annual that is also the state flower of Kansas.

Mammoth Sunflower's hardy nature requires minimal maintenance, giving you more time to enjoy the beautiful blooms it provides!

These organic sunflower seeds produce stately yellow sunflowers with enormous heads, more than one foot across, which provide spectacular beauty first, then seeds for roasting or bird feeding.

An ideal addition to any garden, these sunflowers are easy to grow and yield gorgeous, vibrant yellow blooms. Plus, you'll get a bonus of freshly harvested seeds to use as you wish!

Visit this link to learn more about growing a sunflower garden.

Sku: 1540

Vendor: Ferry-Morse

Common Name: Sunflower

Growing Information Chevron Down Chevron Forward
Safe for bees

for Bees

Good For Pollinators

Good For Pollinators

Grows best In

Best In:

Full Sun


Days to

14 - 21 Days


Container Size:



Growing Height:

84 -144"

water Needs


Average (1 - 2 in / week)

Key Features Chevron Down Chevron Forward

Characteristics: Attracts Butterflies, Pollinators, Songbirds, and Specialized Bees, Pet Friendly

Botanical Name: Helianthus annuus

Fill Weight (grams): 5

Plant Type: Flower

Plant Lifecycle: Annual

Approximate Seed Count: Approximately 10 - 50

Days To Bloom: 75 - 90 Days

Landscape Use: Bedding

Disease Resistance: Deer Resistance|Dry Soil|Poor Soil

Tolerance: Drought Tolerant

Growing Season(s): Spring|Summer

Harvest/Bloom Season(s): Summer

Package Dimensions: 3.25 x 4.5"

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Free shipping is available on all orders over $50. Orders under $50 have a shipping rate of $7.99, and seed-only orders have a shipping rate of $2.99. Most orders are shipped within 2 business days of purchase. However, live plants and embroidered items may take 2-7 business days to ship, depending on the day of the week you place your order. For more information, please click here to review our shipping & returns policy.
Instructions Chevron Down Chevron Forward

After all danger of frost, sow Organic Mammoth Sunflowers seeds in open ground well exposed. Cover with 1" of soil. When plants are 4", thin. Needs lots of water.

Planting Depth: 1"

Seed Spacing: Plant Organic Mammoth Sunflowers seeds approximately 18 - 24" apart.

Nutrient Care Instructions: Apply SUPERthrive once per week. Soak in solution of 1/4 tsp per gal for 15 min. or longer depending on size and type.

Suggestions Chevron Down Chevron Forward

Excellent for tall blooming backgrounds and screens for unsightly places. Harvest seeds by cutting flower heads when backs yellow, then hang downward in a warm, dry place.

At Ferry Morse, we are proud of our non-GMO & guaranteed fresh seeds.

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