Sow
0.99 inches (2.54 cm) deep with a guideline distance of
2.97 inches (7.62 cm). Soil temperature should be kept higher than
4°C / 39°F to ensure good germination.
By our calculations, you should look at sowing Delta Louisa about 42 days before your last frost date.
As Delta Louisa is half hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.