Up to 10 foot tall and requires up to 100 days to mature. This 100% doube flowered sunflower is well worth the wait. This prolific multipal heading sunflower produces one main head and then up to 10 additional smaller heads which branch of the main stem. The frilly double heads do produce pollen but are an even mass of golden petals. Stems are very sturdy but may need staked in windy conditions. A must for any fence or large hedge planting.