Sow at a depth of approx.
0.25 inches (0.64 cm) and aim for a distance of at least
2.97 inches (7.62 cm) between Kale plants. Soil temperature should be kept higher than
13°C / 55°F to ensure good germination.
By our calculations, you should look at sowing Siberian Wild Kales about 49 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Siberian Wild Kales is a very hardy plant.