Is the oenothera primrose (glowing magenta) invasive like other primroses? I just bought a cluster of 5 to plant in the front of one of my perennial flower beds, loved the color and fact that they bloom all summer. I do not want them to take over my flower beds. I am terrified from reading others posts on different types of primroses that they will destroy my yard. I can't find much info about them being invasive or not online. Please help me! Emily (utah)