How hardy are Citrus
I have my Citrus trees in pots in an unheated garage which is attached to my house so I assume it gets a little heat from the house. I have a meter in the garage which I monitor During the day the Temp ranges from 45 to 50 but at night it drops to 40. Among my trees are Washington naval. Lime, Tangelos and Satsuma Mandrin. I know the Satsuma is very hardy and it does not mind cold temp how about the other ones can they stand 40 until the summer shoes up. I have a track lights with 4 of 60 watts lamps which provide some heat but nothing to speak off. Should I increase the number of lamps to 6 and its power to say 100 watts. Thank you for listening.