We will be planting grass along the steep sides of a ditch in our yard. The ditch wraps around the 1 acre yard. The ditch was slice seeded about 4 years ago, when we seeded our entire yard, but only some of it took. We now have large areas of eroded ground with no grass. We were told that there is a green mesh-like product that we can use to hold the topsoil and seed to the ditch, even during rainy season. What is this product called and are there any other suggestions for trying to plant on such a steep slope? Thank you.