Question
I have a rubber tree that is over 20 years old.  It is currently outside with lots of sun light.  I noticed that is now getting lots of black spots.  I guess this is some kind of fungus?  How would I treat it.

Thanks,
Diane

Answer
Diane,

If it is outside in full sun and has never been out before it is probably sunburn. A ficus elastica (rubber tree) usually grows in the jungle where it is not sunny. Move it to under a tree or on a covered porch. It cannot take full sun. I do not know of any fungal problems that would cause black spots on rubber trees. Good luck.

Darlene