They were outdoors from late spring till a few days ago. They will remain here through the winter, till next spring. The solarium is kept at 55 degrees F at night, the temperature rising to 90 F often in the day from the sun's heat. So, artificial heat is required only at night on a really cold night (latter half of December, January, February, March) only. Why 55 degrees? The plants, mostly tropical, have over the years adapted to the lower temperature at night. Years ago, the curry leaf plants would shed their leaves by February. I thought they would not make it alive by spring. They did develop new leaves by spring and they do not shed anymore. I had to get them used to the lower temperatures at night to keep the heating bill down. It is still an expensive hobby and needs work.The plants get watered well twice a week and manured/fertilized once a month. Pruning keeps the curry leaf plants at the current height of about 6 feet.In winter, the vents are all closed and the humidity causes condensation which is good for the orchids .
ANOTHER TROPICAL PLANT - any GUESSES?