The growth of seedlings and buddings of rubber is periodic and the growth during the first 3-5 years is purely vegetative. Also, rubber tree undergoes a phase change during its development process. Trees attain the mature phase in 5-6 years of age which is generally characteristic by flowering and wintering. As far as the rubber planting is concerned,the physiological and biochemical characteristics related to the mature phase, such as slow growth rate, loosing of root regeneration capacity, high content of phenolic compounds etc are all undesirables. All improved or known clonal materials belong in this phase. Being a long term perennial tree, with 30 years life span, use of quality guaranteed plants in every planting programme cannot be over emphasized. Though the potential yields of new clones recommended are in the range of 1,500-2,500 kg ha-1 yr-1, the national average productivity of rubber in Sri Lanka is in the range of 700-900 kg ha-1 yr-1. One of the main reasons for not been able to reach the potential yield in Sri Lankan plantations is the use of poor quality plants. The annual planting hectarage in Sri Lanka is about 5,000 which requires 2.75 million budded plants. This quantity should be produced in government owned nurseries located in different regions under the management and the strict supervision of the Rubber Research Institute for the quality. Furthermore, the government spends about 500 million rupees annually on new and replanting of rubber. Therefore, it is the responsibility of all national organizations involved in rubber sector to take necessary steps to guarantee the production and supply of high quality plants in order to achieve the potential yields of the clones recommended.