Keep in mind when planting that Sunrise Serenade is thought of as tender, so it is really important to plant out well after your last frost date.
Soil temperature should be kept higher than
15°C / 59°F to ensure good germination.
By our calculations, you should look at sowing Sunrise Serenade about 25 days before your last frost date.
As Sunrise Serenade is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.