I'm at my mother-in-law's in Lubbock and she has brought her dwarf pomagrante tree into her sunroom for the winter. The leaves are turning yellow and falling off. Why is this? Is it deciduous?
It could be too much water and/or not enough light. Also, make sure the plant doesn't receives hot air from the heating system (if any).
They are deciduous and most varieties are hardy to about 15 deg. My dwarf survived 17 deg. last winter with no damage.
Mine has been inground for 7 years, and has survived ALL the winters, including last year's, with the prolonged freezing weather.
Mine...I never worried about it for years now. Cold, no problem. But of course, it's in the ground...potted plant might be a bit different
The one at my mom's house survived 3 degrees. It was in ground and well established.
My neighbor's plant in down town Austin survived the great cold front of '87 where it got down to 3 degrees.