Perennials: Rudbeckias - annual or perennial?, 1 by jmorth

jmorth wrote:
Returnee rate is low though usually a few (probably determined by the degree and severity of ground heaving due to freeze cycles). I add some new plants (from seed) every few years; most are self-seeded. The crosses are all natural by nature's pollinator's. I think the self-seeding works best if the ground around the plants is mulch free.
The Chimchiminee above is from seed this year as are the following couple of posts.