Since we bought the house 8 years ago, we have had this growing along the side of the house in our dogs yard in the shady part. Well, not really any left in the dogs yard now but so now its growing by our front steps almost under the lilac trees. They are pretty, grow straight up almost like they want to climb and then flower. I just do not know what they are and how do I grow more? Do they seed or roots or something?