Seed is sterile or will not come true to plant.
Sow 0.78 inches (2.0 cm) deep with a guideline distance of 2.60 feet (80.0 cm). Soil temperature should be kept higher than 12°C / 54°F to ensure good germination.By our calculations, you should look at sowing Park's Whopper about 42 days before your last frost date.
Plant to the first set of true leaves to promote strong root growth.
As Park's Whopper is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.