- Single stem
- Annual
- Yellow
- Single
Mammoth
Russian Mammoth · Mammoth Russian · Mammoth Grey Stripe
Annual single stem sunflower in yellow, blooming in midsummer, late summer, and fall. One yellow flower head 10 to 12 inches across with a brown center on a single stalk. Grown as an annual in every zone.
Single source
At a glance
- Flower form
- Single stem Single · 10–12 in (25–30 cm)
- Colors
-
- Yellow
- Blooms
- Midsummer, Late summer, Fall 80 days from sowing
- Vase life
- Not grown for cutting
- Height
- 12 ft (366 cm)
- Sunlight
- Full sun
- Hardiness
- Grown as an annual in every zone Annual
- Planted as
- Seed
- Botanical name
- Helianthus annuus
In the garden
- Occasionally severely damaged by deer (Rutgers rating)
Origin
Heirloom giant sunflower described by Burpee as one of the oldest sunflower varieties, grown for its large heads and grey-striped seeds.
Sources
Where to buy
Prices rechecked dailyWe may earn a commission when you buy through these links. Your price stays the same. Prices checked Oct 14, 2026.
All photos
Questions
Is Mammoth hardy in my zone?
Mammoth is an annual: it flowers and sets seed in one season, so hardiness zone decides when to plant it, not whether it survives winter.
Does Mammoth need full sun?
Mammoth grows in full sun.
When does Mammoth bloom?
Mammoth blooms in midsummer, late summer, and fall, about 80 days from sowing.
Is Mammoth good for cutting?
Our sources don't list Mammoth as a cut flower or give a vase life for it.
