Sow at a depth of approx.
0.58 inches (1.5 cm) and aim for a distance of at least
3.12 inches (8.0 cm) between Cauliflower plants. Soil temperature should be kept higher than
24°C / 75°F to ensure good germination.
By our calculations, you should look at sowing Autumn Giant about 14 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Autumn Giant is a hardy plant.