The sugar solution in hummer feeders does not ?freeze until about 20*F (-3*C). ? ?Consult a high school chemistry book for an explanation. ??
I have two feeders near each other. ?If I think it will get cold enough at night to freeze the sugar solution, I will bring one feeder in for the night and leave the other one out. ?If the outdoor feeder freezes, l'll swap the two until the frozen solution melts. ? ???Bill Anderson; Edmonds, WA. USA