Description
Mammoth Sunflower is the towering record-chasing heirloom – thick sturdy stalks reach 3-4 m (10-13 ft), topped by enormous golden heads up to 30 cm (12 in) across that track the sun and feed birds all autumn once dried.
Thank you for reading this post, don't forget to subscribe!Why gardeners choose it
- Towers to 3-4 m with enormous 30 cm golden heads
- Classic heirloom colour, fast dramatic growth
- A favourite first seed for children
- Seed heads feed birds through autumn
Growing guide
- Sow: direct after last frost, 2-3 cm (1 in) deep
- Germination: 7-14 days at 18-24 C (65-75 F)
- Spacing: 60-90 cm (24-36 in) apart, sheltered from strong wind
- Light: full sun; harvest 80-100 days
Germination-tested seed, packed fresh and shipped worldwide from Seeds Grow In.
