Helianthus annuus
Helianthus annuus
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They quickly mature in full sun and benefit pollinators in your garden.
Mammoth Sunflower Seeds provide lasting beauty and enjoyment for an entire season. Under the right conditions, these sunflower seeds should germinate in 14 to 21 days and reach maturity in 75 to 90 days.
When mature, this flower has an enormous head, measuring more than one foot across! First, it provides spectacular yellow beauty to your garden, and then it gives you seeds for roasting and eating. What more could you ask for?
Are you interested in growing a sunflower garden? Visit this link to learn more.
Sku: 6544
Common Name: Sunflower
Botanical Name: Helianthus annuus
Full Sun
14 - 21 Days
18"+
84 -144"
Average (1 - 2 in / week)
Characteristics: Attracts Butterflies, Pollinators, Songbirds, and Specialized Bees, Pet Friendly
Fill Weight (grams): 5
Approximate Seed Count: 10 - 50
Plant Type: Flower
Plant Lifecycle: Annual
Days To Bloom: 75 - 90 Days
Landscape Use: Bedding
Resistance: Deer|Dry Soil|Poor Soil
Tolerance: Drought|Heat
Growing Season(s): Spring|Summer
Harvest/Bloom Season(s): Summer
Package Dimensions: 3.25 x 4.5"
Sow a few seeds evenly spaced in hills, 8 inches high and 12 inches across. Young vines should have a fence, trellis, or heavy cord on which to climb. When young vines are about 8 inches, thin to 3 plants per hill. Does not transplant well.
Planting Depth: 1"
Seed Spacing: Sow Mammoth Sunflower seeds roughly 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.
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.
Free shipping is available on all orders over $35. Orders under $35 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.
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