I have a two terrace backyard and two slopes (slightly steep). One
slope has plants on it and the other doesn't. I am not sure how to
plant on slopes. I want to cover the second slope with bushes
(recommendations?) and ground cover. Both slopes get full sun. I just
don't know how to plant the bushes.

Also, both slopes have clay soil (no surprise). I bought tons of black
cow and peat moss. I'm going to rent a tiller but I'm kind of uneasy
about tilling on a slope.

Any experience you could share on one or both of these subjects would
be greatly appreciated!

Thanks!