Festulolium Grass

Planning on seeding 15 acres with Hay seed, Alfalfa and OG predominantly. The ground is surrounded by trees along the fence row. Cleared out the Honeysuckle and smaller trees. The ground was lease for 4 years to grow organic crops. It was organically certified. Pulled soil samples, applied fertilizer and had it chisel plowed. So now the question. Anyone have any experience with Fojtan Festulolium as a cover crop? From what I read it comes in fairly fast, +- 30 days and last up to 3 years. I used Greenspirit on 17 acres as a cover crop and did great holding back the weeds. What I did not like about Greenspirit, it was stemmy.

Festulolium Grass