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Mammoth Sunflower

This heirloom sunflower (Helianthus annuus) was originally introduced to the states in the 1880s, and is still the most popular sunflower around. Russian Mammoth towers over the garden with thick stocks that grow up to 12 feet, with flowering heads and yellow blossoms that can reach up to two feet in diameter and attract a great deal of attention from bees and other pollinators. As flowering heads mature they become loaded with large, delicious seeds. This crop can also be used for crop biomass generation - desiccated stalks add a great deal of carbon to any compost pile.

80 days from seed to flower. Annual.

Seeds are certified organic.

Size: Packet: 20 seeds (2.8 grams), OG

This heirloom sunflower (Helianthus annuus) was originally introduced to the states in the 1880s, and is still the most popular sunflower around. Russian Mammoth towers over the garden with thick stocks that grow up to 12 feet, with flowering heads and yellow blossoms that can reach up to two feet in diameter and attract a great deal of attention from bees and other pollinators. As flowering heads mature they become loaded with large, delicious seeds. This crop can also be used for crop biomass generation - desiccated stalks add a great deal of carbon to any compost pile.

80 days from seed to flower. Annual.
Seeds are certified organic.

Common Name:
Mammoth Sunflower
Scientific Name:
Helianthus annuus
Description:
Large yellow heads on towering stalks that can reach over 12 ft. tall! Seeds are great for snacking.
Plant Lifespan:
Annual
Cold Hardiness (F):
Zone 9a (20 to 25)
Light Requirements:
Full Sun (min. 6 hours a day)
Seed In:
Early Spring (Mar 21 - Apr 20), Mid Spring (Apr 21 - May 20), Late Spring (May 21 - Jun 20), Early Summer (Jun 21 - Jul 20), Mid Summer (Jul 21 - Aug 20), and Late Summer (Aug 21 - Sep 21)
Seeding Depth:
1/2 in.
Days to Sprout:
3-7
Optimal Soil Temperature (F):
70
Plant Spacing:
2-3 ft.
Plant Height:
12 ft.
Average Days from Seed to Harvest:
80-90

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