Giant Sunflower (Helianthus giganteus)
Giant Sunflower (Helianthus giganteus) is a tall, stately perennial sunflower native to North America, featuring large, showy yellow flowers reaching up to 3 meters tall.
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Sunlight
Full sun
Watering
Regular watering
Soil
Well-drained
Temperature
Warm to hot
Fertilizer
Moderate feeding
Care Requirements
Full sun
Requires at least 6-8 hours of direct sunlight daily for optimal growth and blooming.
Regular watering
Keep soil consistently moist but not waterlogged, especially during establishment and flowering.
Well-drained
Warm to hot
Prefers warm temperatures for growth, typically thriving in USDA hardiness zones 3-9.
Moderate feeding
Benefits from nutrient-rich soil and regular feeding during the growing season.
Plant Overview
Plant Type
Herb
Plant Place Type
Garden, Pot
Lifespan
Perennial
Plant Height
200-300 cm
Spread
60-90 cm
Growth Rate
Fast
Dormancy
Yes
Leaf Color
Green
Leaf Type
Simple
Flower Size
10-15 cm
Optimal Sunlight Lux
60000
Image Gallery
- kingdomPlantae
- divisionTracheophyta
- classMagnoliopsida
- orderAsterales
- familyAsteraceae
- genusHelianthus
- speciesHelianthus giganteus
Toxic for humans
No
Rating: 0/5
Toxic for pets
No
Rating: 0/5
Edible
No
None