Keep in mind when planting that Giant Picotee Mixed is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside.
By our calculations, you should look at sowing Giant Picotee Mixed about 91 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Giant Picotee Mixed is a tender plant.