Sow
0.49 inches (1.25 cm) deep with a guideline distance of
5.85 inches (15.0 cm). For optimal germination, soil temperature should be a minimum of
5°C / 41°F.
By our calculations, you should look at sowing Sword leaf about 53 days before your last frost date.
Sword leaf is tender, so ensure you wait until all danger of frost has passed in your area before considering planting outside.