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Due to its geographical situation, Baja California Sur is the most arid Mexican state, with the longest length of coast in the country. Hence, the study of halophytes for incorporation into rural agriculture is a priority for this region. In this research, the growth and development of a natural population of the oilseed halophyte Salicornia bigelovii Torr. as affected by environmental factors are analysed. Four transects were traced in the field, with sample sites of 1 m2 every 3 m along each transect from which samples of soil and plants for laboratory analysis were taken, starting at the lowest seashore tide line. Edaphic and environmental factors as well as biomass, plant density, size, and dry matter were analysed through multivariate statistical methods. Three edaphic factors showed correlation with growth and development of individuals: growth was positively correlated with soil organic matter, and negatively correlated with the percentage of sand as a component of texture and with the balance of sodium (SAR parameter) in the soil saturated paste. Part of the results are unexpected because most of the previous work had dealt only with the salinity factor. The results will enable us to determine the next steps to promote the economic use of this species in the study region.