Lucy68 said: Key limes are not as hardy.
Some suggestions for winter... keep the temperature between 50 and 55, over 55 would be ideal.
Citrus need humidity but keep the air moving or you will be fighting mold and mildew.
Don't forget to water.
Hopefully you have good lighting. I would be using full spectrum LED lights rated at 2500 to 3000 lumens left on for 8 - 10 hours a day.
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