Mammoth sunflower
Helianthus annuus 'Mammoth'
USDA zones2 to 11
SunNeeds full sun (6+ hours)
WaterNeeds moderate soil
Size8 to 12 feet tall
- Growth rate
- Fast
- Habit
- Upright
- Bloom season
- Summer, autumn
- Bloom color
- Yellow
- Soil types
- Sand, loam, clay
- Toxicity
- Non-toxic
Garden uses
Attracts
Notes
'Mammoth' sunflower (Helianthus annuus 'Mammoth') is an annual for borders, pollinator gardens, and food gardens. It is not cold-hardy and will not survive freezing temperatures. This plant likes full sun, average moisture, and sandy, loamy, or clay soil. It grows fast to 8 to 12 feet tall and has large yellow heads. Deer tend to pass it by. Bees, butterflies, and birds visit the flowers, and it is grown for its high-quality seeds.
Pairs well with Spitfire nasturtium, Zucchini, and Red fescue.