I have a very old jade plant, or at least it looks really old (the bottom of the trunk is about 3-4 inches thick and the whole thing is about three feet wide). I've had it for about ten years. I keep it in a ceramic pot and give it about a half-gallon of water every ten days or so. It's on a table next to a big window, so I don't think that light is an issue.

One by one, the branches are wilting and falling off. I've noticed that right after I water it, some water goes through the soil and on the table. Does it sound like the soil might be a problem? I've never changed it before.

Does soil need to be changed every so often with potted jade plants? And is there any risk of shocking the plant? What type of soil would you use?

Thanks!

Marynj