Ornamental sunflower
Helianthus annuus
Annual herb; pollen-free branching cultivars are grown specifically as a cut flower crop, distinct from oilseed production.
Family
Asteraceae
Temperature
17-34°C (absolute 5-45°C)
Rainfall
600-1000mm (absolute 300-1600mm)
Altitude
2600m
Soil pH
6-7.5 (absolute 5.5-8)
Soil types
Well-drained, fertile loam