Used in pasture mixtures, Ladino clover has shown most promise in northeast Iowa for dairy pastures. But you may expect satisfactory results wherever soil is fertile and well supplied with moisture.
Wilsie, C. P.; Hughes, H. D.; and Scholl, J. M.
"Ladino Clover For Rotation Pastures,"
Iowa Farm Science: Vol. 6
, Article 5.
Available at: https://lib.dr.iastate.edu/farmscience/vol6/iss7/5