Sow
0.49 inches (1.25 cm) deep with a guideline distance of
4.68 inches (12.0 cm). Soil temperature should be kept higher than
13°C / 55°F to ensure good germination.
By our calculations, you should look at sowing arikara about 21 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as arikara is a half hardy plant.
The botanical epithet is from the Latin annuus meaning “annual”.