So the next spring I planted more seeds. Two years later they have filled in nicely as the delphiniums began to wane. But I think these seeds were crossed with some magic beans!
They have grown over ten feet tall! I had Thomas pose (not easy) in front of the flowers to give a reference size. By the way, Thomas is huge as cats go.
So far no giants have climbed down the super tall flowers, but I have my ax ready just in case. Holy Heck!