Try to aim for a seed spacing of at least
5.85 inches (15.0 cm) and sow at a depth of around
0.98 inches (2.5 cm).
By our calculations, you should look at sowing california blackeye about 0 days after your last frost date.
As california blackeye is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.