Keep in mind when planting that Sorbet Coconut Duet is thought of as hardy, so this plant will grow or become dormant during the winter.
By our calculations, you should look at sowing Sorbet Coconut Duet about 90 days before your last frost date.
As Sorbet Coconut Duet is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.