Giant cultivars grow to 8 feet or more with 12-14 inch flower heads and take 120 days to mature. Semi-dwarf cultivars are between 3-8 feet and most mature in around 60-70 days. Dwarf sunflowers ...

Planting Sunflower Seeds in the Garden Most gardeners plant sunflowers in rows due to their erect forms. If you are planting several varieties, make sure the tallest cultivars won't block the sun ...