By our calculations, you should look at sowing Round Black Spanish about 28 days before your last frost date.
Black roots with white flesh grow to about four inches long.
First brought to this continent (Americas) by the 16th centure conquistadors, this radish was popular among the eighteenth century farmers of the eastern United States, as it was one of the first root vegetables of early spring.
Nero Tondo, Noir Gros Rond D’hiver,