The growth of any plant species is important characteristics which determine the yield of the plant. The growth performance of Tectona grandis was not so far assessed in Nepal. Therefore, this study was objectively carried out to assess the growth performance of T. grandis, show the relationship between the growth and soil nutrients and effect of spacing on the growth. Community and private plantations of this spp. in seven Tarai districts of Nepal were selected as study site. Altogether 215 samples were collected applying stratified random sampling. Particularly diameter and height of 8644 plants were measured and the spacing between plants was also recorded. The age of the plantation was noted from plantation report. Meanwhile, 102 soil samples were collected from 0-10, 10-20 and 20-30 cm depths. The increment of basal area, volume, biomass and carbon were analyzed and N, P, K, C, pH and bulk density were evaluated in the lab. The result showed that mean annual stem volume was the higher 171.46 m³/ha in community plantation while it was only 92.61 m³/ha in private plantation. The average soil organic carbon in community plantation was estimated to be 38.29±6.05 ton/ha whereas it was only 32.77±2.57 ton/ha in private plantation. Total nitrogen was only 0.07% while P and K were 21.23 and 166.04 kg/ha respectively in community plantation. Similarly, carbon and Nitrogen were 0.84 % and 0.06% respectively in private plantation. The P and K were 53.29 and 171.55 kg/ha simultaneously. The pH was 6.50 for community plantation and which was 6.46 in private plantation. The R value of MABAI of T. grandis and carbon was low 0.49 but it was significant (p value = 0.00). It was found that the highest MADI at >3 m spacing with 1.33±0.028 cm but it was the lowest at < 2 m spacing with 1.17±0.018 cm. This study will be useful to see the rotation and effect of spacing and soil fertility on growth performance.