Keep in mind when planting that Boomer 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 Boomer from seed
By our calculations, you should look at sowing Boomer about 91 days before your last frost date.
Transplanting Boomer
As Boomer is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.