there are no pictures that i can link, so i don't know if it's the same one. in google, i saw the purple HARDY GERANIUM (you can call it whatever you like), but that is not what we call geranium. poo! we call that HARDY GERANIUM. it comes back every year, whether you like it or not. if you don't divide it, it eats you up. it grows in the shade. that is it's only value. it looks like a weed with flowers.
what we call plain old GERANIUM is different. it's showier, comes in all shades of red and pink, not purple, and drops dead in the winter. at least in southern new jersey on up. probably further south as well. it needs full sun and is a showcase plant that needs care. lots of water or it gets naked on the bottom.
so you can keep your pelargonium and UNuncover YOUR naked bottom!!!