The distribution pattern of Solanum chilense, S. peruvianum and S. lycopersicoides in the basin of the Lluta River was analyzed in relation to the soil electric conductivity; pH; levels of boron, sodium, potassium, calcium, magnesium, chlorides, sulfite, nitrates, bicarbonates; and altitude of the sites where these populations thrive. Ninety sixsoil samples from sites between 113 and 3580m of altitude that were associated with the growing site of wild tomato plants were extracted and analyzed. The generated data was analyzed through the multivariate method by main components analysis and biplot graphics, as well as univariate and bi-variate descriptive statistics, and Spearman correlation. The information of the resulting variables from the selection analysis of the main components CEs, K and pH, and the altitude co-variate was spatialized. The pH resulted indifferent to the altitude gradient, unlike CEs and K. Regarding CEs, the highest values were found in the lower valley area, with significant variability, although it has a lower variability and values in the sample points at higher areas. For K, it was found that fewer samples exhibit higher values; most of them revealed to be homogeneous with low values. Growing of S. peruvianum is associated to boric-saline soils by its close associations to variables CEs, Na+, Ca2+, Mg2+, Cl-, SO4=, NO3- and B; while species of S. chilense and S. lycopersicoides are closely associated to soils with less salinity and boron, located at higher altitudes.