Update Winter/Spring 2022:
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Sunflower 'Mammoth Grey Stripe' Seeds (Certified Organic)

Enormous sunflower!

Availability: In stock

$3.25

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All orders are hand-packaged and may take UP TO TWO weeks to SHIP.
Thank you for your patience during this time.

Details

Mammoth Grey Stripe is an amazing giant heirloom sunflower with enormous blooms that are 10-15” across. The large yellow flowers with brown centers top plants 8-12’ tall and yield heavy loads of delicious seeds. Fast and easy to grow, these sunflowers are the most familiar and iconic of all the classic sunflowers.

Michigan Seeds and Plants grown on our farm, Renegade Acres, in Howell, MI!

Certified Organic by Oregon Tilth.

Additional Info

Botanical Name Helianthus annuus
Life Cycle Annual
Min. Time to Germinate 5 Days
Max. Time to Germinate 14 Days
Depth to Sow Seeds 1/2 in.
When to Sow Indoors 2-4 weeks before last spring frost, Outdoors after all danger of spring frost is past
Growing Height 10-12 ft. (3-3.6 m)
Plant Spacing 24-36 in. (60-90 cm)
Hardiness N/A
Sun Exposure Full Sun
Danger N/A
Bloom Color Bright Yellow
Bloom Time Mid-Summer
Foliage Herbaceous, Velvet/Fuzzy-Textured
Other Details Average Water Needs; Water regularly; do not overwater, Self-sows freely; deadhead if you do not want volunteer seedlings next season, This plant is attractive to bees, butterflies and/or birds, This plant is resistant to deer
Soil pH Requirements 6.1 to 6.5 (mildly acidic), 6.6 to 7.5 (neutral), 7.6 to 7.8 (mildly alkaline)
Propagation Methods From seed; direct sow after last frost, From seed; sow indoors before last frost
Seed Collecting Allow seedheads to dry on plants; remove and collect seeds, Bag seedheads to capture ripening seed
Seeds Per Pack 25