Mammoth Sunflower- Organic
7910 -¬†Mammoth¬†Sunflower If you like to grow giant sunflowers, then Mammoth¬†is by far your best choice. This huge single flowered type produces heads a foot or more across and stand 12 or more feet in height. Don't need to stake this one - the extra strong stocks are massive with huge leaves which can withstand high winds. 25 Seeds.