(8′) Mammoth Grey Sunflower exhibits a single, huge flower head with thin shelled, striped, meaty seeds. Full sun. Heat and drought resistant. Non-branching variety. 75-90 days.
Annual. 200 seeds/oz., 15-20 lbs./acre, 10-14 days, 68-86ºF.
Plant in full sun, tolerant of poor soil but needs regular fertilization for the best blooming.
Direct seed, seedlings do not transplant well.