Our Giant Single Sunflower Seeds are fun and easy to grow and if you want the tallest sunflowers, these are the ones to grow. They\'ll quickly grow to a great height with enormous golden yellow heads - why not have a competition to see who can grow the tallest? They\'re also a magnet for bees, butterflies and other pollinators. A hardy annual. Sow outdoors from March to May, ready to flower from June to September. Average pack contains 30 seeds. Height 180cm+. Warning:Seeds should not be eaten. Store out of reach of children and pets. Always read the instructions before use.