Skyscraper Sunflower varieties stand tall, reaching heights of up to 10 feet, earning them the title of one of the tallest sunflower species.This sunflower is a low-maintenance annual, boasting bright yellow flowers that measure 14 inches or more in diameter, held aloft by sturdy stalks. Its resilient stalks and vibrant petals make it an ideal choice for eye-catching cut flower arrangements, adding a burst of color to any room.