Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Black Jack is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside.
Growing Black Jack from seed
By our calculations, you should look at sowing Black Jack about 84 days before your last frost date.
Transplanting Black Jack
As Black Jack is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.