In order to determine the interaction between selected edaphic characteristics with growth parameters of Haloxylon persicum in the Choupanan region, Naein, ordination, stepwise regression and Pearson’s correlation were employed. The sampling method was “stratified random sampling” in which the studied areas were divided to 6 sites, according to presence of saxaul as planted or natural, cultivation year and Haloxylon. persicum physiognomy as follow: 1- natural strong saxaul 2- natural weak saxaul 3- natural old saxaul 4- planted strong saxaul 5- planted weak saxaul 6- bare land(rangeland). Then, the age of 6 samples of H. persicum in saxaul sites (3 samples in natural old saxaul site) was determined using two methods: 1-The number of bifurcations and 2-The number of annual growth rings. Other vegetation parameters such as canopy cover area, the primitive of canopy cover, smallest and biggest canopy cover diameter, average of canopy cover diameter, basal area and diameter were measured too. Vegetation parameters of 27 samples of H. persicum with high variation in growth situation were studied totally. In order to study the soil properties, 3 soil profiles with 2 m were dug in each site (in saxaul forest close to each plant sample). Totally 18 profiles were dug. Twenty four soil properties such as: pH, ECe, SP%, total soluble Ca 2+ and Mg 2+ , Cl - , CO3 -- , HCO3 - , SO4 -- , gravel%, CaCO3%, CaSO4%, organic matter %, Clay %, Silt %, Sand %, labile phosphorous, Na + , K + , CEC, SAR, ESP,, PSW and TDS were measured for 90 soil samples. The plant and the soil data were examined using two methods: 1-the RDA ordination technique and 2-the stepwise regression analysis; then the final relationships were achieved. The out coming results show that the same age plant samples have very high variations in measured vegetation parameters which depends on variety of the soil properties. Based on obtained stepwise regression equations ordination graphs, the interaction between important soil properties and vegetation parameters of H. persicum were distinguished. The results showed that the physical properties of the soil such as soil texture and gravel% as well as its chemical properties for instance organic matter %, labile phosphorus, CEC, salinity, alkalinity and CaSO4% have the highest influence on growth parameters of H. persicum . The results indicate that all of vegetative parameters are highly affected by soil characteristics. In this research, it was further proven that the H. persicum age determination is highly accurate using the number of bifurcations.