I have seed for titan sunflowers These get to 15 feet high with 2 foot wide blooms i only have 10 seeds though it should be fun growing giant sunflowers
It looks like Plantsmylove has left the building.
My current volunteers are all scrawny things with multiple flowers, though still six feet tall.
I once grew the heirloom type where you eat the roots; may try that again next year, if I think of it.