I looked up lespedeza and it is reccomended to be planted in the Spring. If I plant it with my clover and feed wheat in late August, will it come up this fall? I'm guessing some will, then will the seed take off better next spring or will it be wasted?

I don't know where your land is located so the following is in general. Common and Korean lespedeza go dormant fairly early in the fall. Planting it in the fall is basically a dormant seeding planting as most will wait to germinate in the spring. Do not, DONOT plant Sericea lespedeza.