Sow at a depth of approx.
0.47 inches (1.2 cm) and aim for a distance of at least
0.98 inches (2.5 cm) between Radish plants. Soil temperature should be kept higher than
13°C / 55°F to ensure good germination.
By our calculations, you should look at sowing Crunchy Royale F1 about 28 days before your last frost date.
As Crunchy Royale F1 is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.