Hummingbirds

I am not a big bird fan (ask my mother...) and while I do love the sound of birds in the morning, I didn't want to deal with the mess of cleaning up seeds on our porch from a conventional feeder.

Earlier in the Spring, I noticed that hummingbird feeders seemed to be in all of the garden shops around the area. Enter my perfect no-seed solution to bird watching: I bought a hummingbird feeder. 

The Sailor promptly installed it for me and I planted some red flowers nearby to attract the birds. 

So far though... nothing. Not a single hummingbird. A few weeks ago I saw one out at our garden, so I know they're around here, but they don't seem to want to frequent my porch. 

I'm a total hummingbird novice... but I did buy hummingbird food and I did plant red flowers. I'm thinking the air conditioning units that are so close to the porch might be scaring them off. 

Any other bird people out there... what other tips can you offer to attract hummingbirds?