I just bought 5 Pygmy Date Palms at Lowes today. What a steal, 1.37 each in ten inch pots. They are about 3 feet tall with multiple trunks. I need to know how to take care of these as houseplants through the winter. Some of the roots are on top of the soil. Do I need to repot or add extra soil to cover the roots? Any help would be greatly appreciated as this is my first time with palms. Thanks, Kay