By our calculations, you should look at sowing Nantes Half Long about 14 days before your last frost date.
Sow in deep, well-worked, stone-free soil after danger of heavy frost from spring to midsummer. Do not transplant, as crooked roots may result. Cultivate periodically or mulch to control weeds. Keep soil evenly moist.
Nantes Half Long is very hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.By our calculations, you should look at planting out Nantes Half Long about 14 days before your last frost date.