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.
Full Sun
14 - 21 Days
18"+
84 -144"
Average (1 - 2 in / week)
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: 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"
After all danger of frost, sow Mammoth Sunflower seeds in open ground well exposed. Cover with 1" of soil. When plants are 4" tall, thin. Needs lots of water.
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 sunflower seeds by cutting flower heads when backs yellow, then hang downward.
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