Sometimes it takes a season or two for the hummers to realize you've put a 'rest-stop' on their migratory path.
The scouts come first, and if your feeders aren't out, the rest of the birds will pass you by.
Almost any red, yellow or orange tubular shaped flower will attract them, just make sure they're planted in an open area so they can be seen from the air.
BTW, did you know hummers can see a feeder from over 2 miles up? They actually can see into the ultraviolet range & have excellent hearing, but practically NO sense of smell!
Thanks. I was trying to locate the feeder in a way they could see it. I put ribbons on it etc. This will be the third year I'm trying to attract them. That is so good to know that they can see it from such a distance. I'm not giving up on them.