Keep in mind when planting that Rip van Winkle 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 Rip van Winkle about 91 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Rip van Winkle is a tender plant.