Sow
0.0 inches (0.01 cm) deep with a guideline distance of
11.7 inches (30.0 cm). Soil temperature should be kept higher than
65°C / 149°F to ensure good germination.
By our calculations, you should look at sowing Twist and Twirl about 56 days before your last frost date.
As Twist and Twirl is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.