I have a slope behind home, red clay, apprx 45 degree, elevation drops bout 7 feet, back of home is apprx 20' from the foot of slope which is bout 90' wide. We want to slow the water down (at least if it does rain this year). My question...would you use a mulch or pinestraw? I have used both and been successful with both, but never on an area this large. This will be an ongoing project and will likely come back at later time and install plants, rock, etc. The primary goal is to slow the water coming down, cover the red clay. Once this is done I'll be sodding (bermuda) what will become the backyard at the base of slope. Any input? Sorry no pics.