Keep in mind when planting that Sorbet 'Blueberry Cream is thought of as hardy, so this plant will survive close to or on freezing temperatures.
By our calculations, you should look at sowing Sorbet 'Blueberry Cream about 90 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Sorbet 'Blueberry Cream is a hardy plant.