The rubber is located on the inside of the tree, you'd have to cut open the tree. You can also do it by the maple syrup method, however it takes a very long time because rubber inside a rubber tree is way more viscous than maple syrup

Well, first of all your rubber tree is not the same plant as the one from which rubber is commercially obtained. The classic indoor rubber tree, rubber plant, or even rubber tree plant is Ficus elastica, native to southeast Asia, there are other ficus also going under rubbery names. Ficus is Latin for fig, yup your 'rubber tree' is a fig tree. The commercial rubber tree is Hevea brasiliensis, native to South America. To make things more confusing, once upon a time some rubber was obtained from Ficus but the quantity and quality did not make it profitable, attempts were made to cultivate Hevea in its native South America but it did not do well on plantations, then a blight in the wild trees pretty much halted rubber production, nowadays most rubber comes from Southeast Asia, but the trees are Hevea transplanted there in the 1800's and where they have done quite well on cultivated plantations. There is still some minor production from wild Ficus but hardly enough to concern anyone but the wandering gatherers. Second of all you won't get rubber, you'll get latex, that thick, milky , sap like liquid common to many plants and to which they owe their "rubber" names, their is even a rubber WEED native to N.America. "Sap like" not sap, sap runs deeper inside the tree, beneath the cambium, the latex runs thru ducts just outside the cambium. The cambium is a thin layer just under the inner bark where most of the actual growth takes place; under the cambium, inside the tree, is the sap wood where the sap flows. The 'maple syrup' method is boring into the sapwood and letting the sap run out a tube. The latex is not 'inside the tree' the syrup method won't work, and you sure don't want to cut into the tree. Latex is obtained from Ficus and Hevea in the same way. Which brings us to the ; Third of all, your gonna have to wait a while to even start, the tree needs to develope a thicker bark and especially a thicker cambium layer. Fast forward 5 or 6 years, your plant is now a full fledged tree some 15 feet tall, with a trunk at least a foot in diameter ( If we do any more fast forwarding stand back, it's gonna get up to 120 ft with an 8 ft trunk over the next 15 or 20 years.) You have to cut thru the bark but not thru the thin cambium layer, if you cut too deep or too far around you'll damage or even kill the tree. You cut a groove, the pros use a knive with a loop sharpened on the inside and outside,reach up high and angle the cut down and no more than half way around the tree, at the bottom cut a short verticle groove and wedge a short trough at the bottom, hang a cup there, it can be a small cup. In a half day you are going to get less than a cup (8 oz) of latex then it is gonna stop flowing, now ya gotta give the tree the next day off. Then you can make another groove just below the first one and collect another half days worth of latex. Latex, not rubber there's a bunch more processing to do before its rubber. Most collectors have to at least roll and smoke the latex Oddly enough you don't roll up, light it and then smoke it, you roll it out in flat sheets and put it in a smoke house before delivery to the next processors. A few more steps and you'll wind up with some balls the size and color of bowling balls, my Dad saw some of those when he went to Brazil in WW2, he got off the boat and there they were, stacked all over the dock, when he was told what they were he figured he could kick one and it would bounce clear across the harbor. He broke two toes and almost got courtmartialed for doin such a stupid thing. The balls are also as hard as bowling balls. There's a bunch more steps envolving heating, boiling, ammonia, acids, mangling and mixing afore you get anything like real rubber. The Amazonian Indians used the latex mostly for a glue and chewing gum, for the longest time all the Europeans could figure out to do with even the processed rubber was as an eraser, which is how it got its name, better than 'lead-eater' another name from back then. Why'nt you grow you some chemical plants, it might be easier to get plastic from them.

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