Hello all, this giant sunflower is a pack of fun! It will impress your kids, family, and friends. These grow tall and fast; it's not uncommon for them to go over 16 feet. They can get 6 to 8 inches at the base. The blooms are a little smaller. Also, the root system is pretty good so they won't easily fall over like other extra tall sunflowers. Get a pack or two today. We also carry the mammoth sunflower if you want tall and a bigger head. Happy growing!!!