established rubber plant
I have this plant in 10 gallon container outside my patio door and protected from rain frosts and direct sun this past summer i noticed loosing lots of yellowing leaves at this time in mid state of az still has some yellowing leaves any suggestion thanks , Susan?
If you have not fertilized, then I would suggest that this is a nitrogen deficiency. However, this could also be a pest related issue. Have you noticed and webbing, or strange substances on your plant?
This article will refresh you on the care of the plant: https://www.gardeningknowhow.com/houseplants/rubber-tree/how-to-care-for-a-rubber-tree-plant.htm