Keep in mind when planting that Quills & Thrills is thought of as tender, so it is imperative to wait until temperatures are mild before planting out of doors.
By our calculations, you should look at sowing Quills & Thrills about 49 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Quills & Thrills is a tender plant.