Russian Mammoth Sunflower

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:
Zone 9a
Light Requirements:
Full Sun (min. 6 hours a day)
Seed In:
Spring-Summer
Seeding Depth:
1/2 in.
Days to Sprout:
5-10
Optimal Soil Temperature (F):
70
Plant Spacing:
2-3 ft.
Average Days from Seed to Harvest:
80-90

Search our shop