Why don't my grandmother see any humming birds?
Answers:
From what I understand, if you put the right food out, they will come. It just takes time. I know they love yellow and red gladiolas flowers. We always had them every year once we planted those in the yard. Make sure the feeder is not to close where humans walk by all the time. We had one near our kitchen window and it seemed ok.
Other answers:
Needs new glasses?
Needs new glasses?
make sure the water mixture is 4 to 1. 4 parts water, 1 part sugar. boil that quickly cool and replace the old mixture
If she would put other things in there to attract them, it would be nice also. They may not see that hummingbird feeder, because they are not in that yard.
Put some flowers in there that may attract them first, then they will see the feeder and hit that also.
And get those CATS away from the yard!! LOL!!
I wish you well..
Jesse