or you can plant a rye/clover mix in the fall and mow the rye the following spring to reduce competition for the clover. i "experimented" w/ this mix last fall (no herbicide treatment) and will manage the plot this spring and summer w/ maintenance mowing and chemical weed control.
here's some pics i took last weekend.
close-up of rye/clover mix
compare to this "pure" ladino clover plot i planted last fall