Do you have a guideline for the size and shape of pot that is good for an indoor rubber plant? Mine right now has grown to 30 inches high and spreads out to 27 inches wide. It is in a pot that is only 4 1/2 inches high and 9 3/4 inches wide. Do I need to repot it now and in what size and shape of pot?
Generally, you should go one or two pot sizes up. In addition, you could try root pruning. When the roots are filling the current container and you don't want a larger one, then root prune the plant to about 1/3 of the roots in summer. I would also top prune 1/3 of the foliage to prevent transplant leaf drop. Afterward, repot with fresh soil in the same container (or choose a larger one if desired) and water thoroughly. Do not water again until the soil becomes dry or new growth appears, at which point you should care for the plant as usual. Repeat the process as needed.
This article may also help: https://www.gardeningknowhow.com/houseplants/hpgen/prune-roots.htm
The bark on my rubber tree has narrowed and shriveled at the upper middle part of the tree's trunk. All the bottom leaves have fallen off. And in the area where the narrowing is, there hasn't been any outer bark development. It's dark brown and not green, so I'm wondering if that's the problem which caused the trunk to 'catch cold' since the plant is near an open window, but it's never been exposed to under 55 degrees. It's been kept out of direct sunlight and watered once every two weeks or more as to avoid root rot. Can you tell me how to revive this plant, and what the problem might be?
It's hard to say, but If there is any life left in it, you can try the steps in this article: https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
Why is my rubber tree growing taller and taller? I cut the top already, and now it is 4 ft tall with two parts on top growing taller also.
The only thing you can do is prune it annually. This article will help with that:
https://www.gardeningknowhow.com/houseplants/rubber-tree/prune-rubber-tree.htm
I have a large multi-branched rubber tree. One of the main branches broke off. It was very thick, and I'm not sure what to do with it. It seems to be getting moldy inside where it broke off. Do I fill the large hole with dirt, moss ?
Do not fill the hole, but I would treat it with a fungicide. It sounds like the tree has a fungus and that was what hurt the limb. It may be spreading to the rest of the tree.
My neighbor gave me her rubber tree about 5 years ago. It is doing well, keep it inside near a northern exposure. One time, it got a very sweet smelling flower. The whole house smelled like honey. Will it ever flower again?
Most indoor settings do not provide enough light for rubber trees to produce flowers; therefore, to have these plants bloom indoors at all is quite an accomplishment. Whatever you did to get it to flower, keep doing it. If you're lucky (and obviously you are), it will bloom again.
I have a rubber plant which is about 4 feet high. The problem is a branch of over 2 feet which has a few branches of its own and is as thick as the original trunk. This is making the whole thing unstable. We have propped the branch up with wood for now but the branch will have to come off. Can anyone please tell us how to do this and how do we help the wound on the main stem heal?
This article will help with the pruning:
https://www.gardeningknowhow.com/houseplants/rubber-tree/prune-rubber-tree.htm
After you prune, you can use some fungicide on the wound but nothing else. Sealing the wound can trap disease in the wound and harm the plant.
I received a rubber tree plant as a gift last year. I keep it in my bedroom near french doors. I water it once a week. The leaves keep coming off and some grow back, but then fall off again. What am I doing wrong?
Rubber trees are only hardy to 30 degrees F. If it gets colder than that at all where you live, the tree cannot not be planted outside permanently. You can keep it outside in a container in the summer though.