Try to aim for a seed spacing of at least
3.12 inches (8.0 cm) and sow at a depth of around
0.47 inches (1.2 cm). Soil temperature should be kept higher than
4°C / 39°F to ensure good germination.
By our calculations, you should look at sowing January King about 21 days before your last frost date.
As January King is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.
By our calculations, you should look at planting out January King about 21 days before your last frost date.