planting ornamental grass without rototilling
I have a 30 x 5 foot section of dying lawn on a steep slope. My plan is the following -
1) Kill existing grass with roundup
2) Plant clump - forming ornamental grass spaced 12-24 inches apart in EXISTING dead grass by using a post hole digger and filling holes with amended soil and new plantings.
3) Mulch on top of dead lawn around newly planted ornamental grasses.
I'm wondering if skipping the rototilling as described above will present problems. I really don't want to rent a rototiller and deal with disturbing the soil and working on a steep slope. I'm also hoping the dead grass acts as a mulch and prevents erosion.