LIFE CYCLE
Annual
PLANT CHARACTERISTICS
Extra-large blooms
GROWTH HABIT
Upright tall
BLOOM SEASON
Summer
FLAVOUR PROFILE
Ornamental
SUITABLE FOR
Outdoor
SEED TYPE
Open pollinated
PLANT TYPE
Flowering plant
PLANTING SEASON
Spring
FRUIT SIZE
N/A
PLANT HEIGHT
Very tall
LIGHT REQUIREMENT
Full sun
WATER NEEDS
Moderate
HARDINESS ZONES
3–10
CONTAINER GARDEN
No
PLANT SPACING
Wide
PLANTING DEPTH
Shallow
GROWING CONDITIONS
Well-drained soil
Frequently Asked Questions
How large can Mongolian Giant Sunflowers grow?
How large can Mongolian Giant Sunflowers grow?
Mongolian Giant Sunflowers are known for exceptionally tall growth and very large flower heads when provided with suitable growing conditions.
What sunlight does Mongolian Giant Sunflower require?
What sunlight does Mongolian Giant Sunflower require?
Full sun is ideal, with several hours of direct sunlight supporting strong stems and large flower development.
When should Mongolian Giant Sunflower seeds be sown?
When should Mongolian Giant Sunflower seeds be sown?
Sow outdoors after the soil has warmed and the risk of severe cold has passed, or start earlier in suitable protected conditions.
Does this sunflower variety need support?
Does this sunflower variety need support?
Tall plants may benefit from staking or another support system, particularly in windy locations.
How much space should be given between giant sunflower plants?
How much space should be given between giant sunflower plants?
Give plants generous spacing so their large leaves and root systems have enough room and airflow.
What makes Mongolian Giant Sunflowers useful in landscaping?
What makes Mongolian Giant Sunflowers useful in landscaping?
Their exceptional height and oversized flower heads create dramatic vertical interest and can serve as a striking garden focal point.