I've got a hill with very heavy clay soil that I'd like to start filling up with a variety of drought tolerant perennials. It's a challenging spot. Pretty much all that grows there now is grass.
I know red clover will grow and I sowed a whole bunch of that a few weeks ago. There's a rose bush in the middle of the hill and it does OK. I planted some comfrey roots a couple weeks ago too and am pretty sure those will do fine. If they can spread, more power to 'em!
I'm open to anything rose bush sized and smaller. The hill is about 30x100 feet.