Things are different in different parts of the country -

But I would buy 3 lbs of Red/acre - Skip the Lespedeza - and get 6 lbs of ladino, or similar white clover - to mix with the red per acre.

Lespedeza - is usually an annual I think. So if you mix it in - it will be gone after 1 or 2 years. Ladino lasts for about 5 years, and Red about 2 years.