I covered a slope that size at a house with the sedum I have in the picture. Someone more knowledgeable than myself will be able to ID that sedum because it is common and it is aggressive, which make it perfect for covering large areas quick. That area I put 3 small clumps last summer and before summer was over it was covered. Cutting work good with this sedum
I cut cardboard the size I wanted the area growing down the driveway to Cover the weeds.. I put a little soil on top of the cardboard and pushed the sedum in the little soil I had there.
The hillside I was doing I just added some daylilies and the hillside was covered and I did not have to ever mow or go down there again.
