Keep in mind when planting that Big Mac 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.
Growing Big Mac from seed
By our calculations, you should look at sowing Big Mac about 91 days before your last frost date.
Transplanting Big Mac
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Big Mac is a tender plant.