Sow at a depth of approx.
0.51 inches (1.3 cm) and aim for a distance of at least
5.85 inches (15.0 cm) between Broccoli plants. For optimal germination, soil temperature should be a minimum of
10°C / 50°F.
By our calculations, you should look at sowing Romanesco Italia about 42 days before your last frost date.
Romanesco Italia is tender, so ensure you wait until all danger of frost has passed in your area before considering planting outside.