La Soda was selected from a cross between Triumph and Katahdin. The mutant was observed in 1949 and released as a variety by the USDA and Louisiana Agricultural Experiment Station in 1953. It is harvested in the winter months as a fresh market variety. Plants are medium in size and spreading in habit. Stems, leaves and petioles are green with light pubescence.
Tubers are round to oblong, slightly flattened with medium deep eyes.
Tubers have a tendency toward skinning. Skin texture is smooth and color is deep red which tends to fade with time. Flesh color is white. Specific gravity tends to be low, thereby making the tubers well suited for boiling. Dormancy is long.