My mother has one, and I have a smaller genetic duplicate from a branch from it. The tree is about 6 feet tall, and we keep it in a good sized pot with consistent and good watering. It goes outside in the hot summer months and inside by the fire in the winter, and it's greener than any rubber tree I've seen. But when I cut my branch, nothing came out. No rubber, no latex. So how old does it have to be to get rubber from it?
Certified GKH Gardening Expert
It is important to note that the latex from the actual rubber tree is different from the latex of the ficus rubber tree. This latex is toxic and skin irritant. It is important to know which species that you have.
If you can send in a picture, then I can help you identify which tree it is, and pinpoint the exact problem.