Rubber plantation in India, which commenced almost a century ago, is extending to new regions, spread over different parts of the country, in search of ways to bridge the gap between production and demand. The newly established rubber growing regions are different in their agro climatic conditions from the traditional rubber growing tract and hence a study was undertaken to assess the genotype x environment interactions of proven and new hybrid clones. Data on girth, bark thickness and number of latex vessel rows from 12 clones planted at four locations were used for preliminary assessment of growth. Results showed that there was a significant genotype x environment interaction. Analysis for stability showed that the clone 82/30 is a stable and adaptable clones and is followed by RRII 51, 82/17 and RRII 105. Principal component analysis done for these parameters resulted in the identification of 4 clones as stable. This study also revealed that multivariate analysis could be used in Hevea for stability studies. Clones 82/29 and 82/30, the new hybrid clones are promising with respect to their growth in different locations and are found to be suitable for cultivation in both traditional and non-traditional regions.