The use of assorted seeds to develop root stock material for budgrafting in rubber produced highly heterogeneous stock seedlings, which can interact with the scion to generate variability at different levels. This study was conducted to estimate the variability and associations of certain quantitative traits of root stock seeds, seed germination and juvenile growth attributs of resultant seedlings. The assorted seeds have been compared with three different monoclonal seed types for these characters. Low magnitude of variability, within group, was recorded for all the characters under study in monoclonal seeds, while though assorted seeds showed comparatively higher value. The seeed characters and germination percentage recorded high heritability, in the broad sense, while for the juvenile growth attributes it was low. The seed types showed significant differences for the various traits studied. Germination percentage was the most reliable criterion for seed viability and seedling growth. Root/shoot ratio was more influenced by the shoot biomass than the root biomass. The results of this study confirm the validity of assorted seeds as the best material for raising stock seedlings. For further improvement of the quality of root stock seeds collected from Kanyakumari region, it is suggested to avoid mixing with seeds of the clone PB 28/59.