Many types of sweetpotatoes exist. Skin color may be various shades of tan, yellow-orange, red or reddish purple. They have been grown successfully in the Hermiston area for local market. They may be grown in the Ontario, Nyssa and Medford areas. Hot days and warm nights are important for successful commercial production.
Long days promote vine growth while shortening days induce root development.
SOIL Sandy and sandy loam soils that are well drained are generally best for sweetpotato production. Heavy soils and soils very high in organic matter are poorly suited. Soil pH should be 5.5-6.0. Long-time rotations are recommended because of scurf and Fusarium wilt. Scurf is also aggravated by high soil organic matter.