Start seeds indoors six weeks before last frost date.
Try to aim for a seed spacing of at least 2.60 feet (80.0 cm) and sow at a depth of around 0.78 inches (2.0 cm). Soil temperature should be kept higher than 12°C / 54°F to ensure good germination.By our calculations, you should look at sowing Hungarian Heart about 42 days before your last frost date.
Transplant out when around 15cm (6 inches) high.
Plant to the first set of true leaves to promote strong root growth.
As Hungarian Heart is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.Brought to U. S. in 1901 from a little village 20 miles from Budapest. First listed in 1988 by SSE member Ed Simon from Pennsylvania.
from SSE seed packet as noted above