At what age should rubber trees be tapped?
You can start harvesting sap 7-8 years after planting. If the plant is grown from pure seed, it should be 20 inches high and 18 to 20 inches in diameter. If it is a grafted plant, you can start harvesting sap when the plant is 50 inches high and 18 to 20 inches in diameter.
It depend on different variety of rubber species. Generally, 6 - 8 years after growing.