Burpee Mammoth Organic Sunflower Seeds
This is an amazing giant heirloom sunflower with enormous blooms up to one foot across. The large yellow flowers with brown centers yield heavy loads of seeds and grow from nine to twelve feet tall. Fast and easy to grow, Mammoth sunflowers are great for creating a sun forest for kids, a tall annual hedge or screen. Sow in the spring after the last average frost date.
When around three inches tall, seedlings should be thinned to two feet apart—edible seeds attract birds and make great snacks. To save seeds, cut the stem beneath flower heads when the backs of the flower heads turn yellow. Hang upside down and let dry in a cool, dry place for about a month. Cover with netting or a paper sack with holes to keep seeds from falling. But watch out for squirrels!
- Certified organic seed
- Lifecycle: annual
- Uses: borders
- Sun: full sun
- Height: 9-12 feet
- Spread: 36-40 inches
- Sowing method: direct sow/indoor sow
- Bloom duration: 5 weeks