Sow at a depth of approx.
0.49 inches (1.25 cm) and aim for a distance of at least
4.68 inches (12.0 cm) between Sunflower plants. For optimal germination, soil temperature should be a minimum of
13°C / 55°F.
By our calculations, you should look at sowing Tarahumara about 21 days before your last frost date.
Tarahumara is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.
The botanical epithet is from the Latin annuus meaning “annual”.