Known by the botanical name Ficus elastica, rubber trees take their name from the latex in their milky sap. The tree may reach its mature height after only 13 years. . Fighting off mold and bacteria is part of the plant's defense mechanism to protect its soil. Method 2 Using Natural Methods 1. A rubber tree is a slow-growing tropical evergreen tree that can grow up to 100 feet tall but will only live up to 25 years in cultivation. Rubber tree plants are native to India and Southeast Asia, where they grow in dappled sunlight under taller trees. But indoors their height tops out at 6 to 10 feet. . Rubber Tree Farming. Outdoors, the rubber tree, also known as the Ficus elastica, grows up to 50 feet. How long does it take for a rubber plant to grow into a tree? Rubber Tree Plant Height A quickly growing species, a rubber tree gains 24 inches or more in height each growing season. Their native growing area is Southwest America where they receive about 15 inches or 40cm of rainfall in a year. . It has become. They’re also found in low altitudes in wetlands. Rubber trees are cultivated commercially on plantations in the tropics and subtropics, especially in Southeast Asia and western Africa. PC210, PC228UU, PC220, PC240, PC300, and the PC400. Some good trees to grow indoors in places with low light are rubber plants, ponytail palm trees, figs, and cast-iron plants. For watering, this wintery season you won’t have to do as much. But popular houseplant species such as rubber trees and their cousins, the weeping figs (Ficus benjamina. Outdoors, the rubber tree, also known as the Ficus elastica, grows up to 50 feet. Why we recommend it: Not only do they get delicious lollipops, they'll be able to grow edible plants in their own backyard when they're done. . . rubber tree, (Hevea brasiliensis), South American tropical tree of the spurge family (Euphorbiaceae). . In an outdoor setting, it can reach a maximum height of 50 to 100 feet.