Keep in mind when planting that White Queen is thought of as tender, so it is really important to ensure that the outside temperature is well above freezing before planting or moving outdoors.
Soil temperature should be kept higher than
68°C / 154°F to ensure good germination.
By our calculations, you should look at sowing White Queen about 77 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as White Queen is a tender plant.