I'm always looking this up, like every time I fill the feeders. So, this is for all of us. Here's the mix ratio of sugar and water for the Hummingbirds. Love the hummingbirds!
Directions for making safe hummingbird food: Mix 1 part sugar with 4 parts water and bring to a boil. This is to kill any bacteria or mold present. Cool and fill feeder. Extra sugar water may be stored in a refrigerator.