Our rubber tree seems to be doing well but is a tad spindly. I've been researching online and believe pruning will take care of that. One question I haven't found an answer to is: how large should the pot be? Do they prefer to be contained in smaller pots, or do they do better in larger pots? We are considering repotting it but aren't sure about the size. It's in a rather large pot (about 2' wide and 2' tall). It is about 3' tall at present.
Rubber Tree Houseplant
Certified GKH Gardening Expert
If your rubber tree is pot bound, the rule of thumb is to transplant to the next size planter. If your plant isn't pot bound, you might want to knock off excess dirt and repot it in fresh soil. The following articles may also be helpful: https://www.gardeningknowhow.com/houseplants/rubber-tree/how-to-care-for-a-rubber-tree-plant.htm