The Para rubber (Hevea brasiliensis) tree is the chief source of natural rubber (NR) latex. It is one of the important commercial crops of South East Asian countries including India. In order to broaden its narrow genetic base, the International Rubber Research and Development Board (IRRDB) in 1981 collected a huge wild Hevea germplasm from the Amazon rainforests of Brazil. India has received a share of the wild Hevea germplasm from the IRRDB which are under evaluation. To meet the ever-increasing demand, NR cultivation has been extended to non-traditional regions in India. The crop in these areas often exposed to various abiotic atresses, especially low and high temperatures which affect its growth, thereby increasing its uneconomical immaturity period and productivity. A set of 18 wild Hevea accessions along with two modern clones (RRII 203 and PB 235) and two check clones (RRIM 600 and Haiken 1 were evaluated in RBD at Nagrakata, West Bengal, the sub-Himalayan cold-prone region of India. The genotypes exhibited highly significant clonal differences (P=0.05) for all the growth traits such as plant height, bark thickness, girth of plant, annual girth increment (cm/year) and winter girth increment (cm/year). Wide differences between the phenotypic coefficient of variation and genotypic coefficient of variation were observed for vigour under cold stress was identified which could be used in reducing immaturity period in this crop. These selections have high potential value for the development of cold-tolerant clones to mitigate climate change for these regions and also in broadening the genetic base of the present-day cultivated rubber.