We use an artificial nectar recipe of one part ordinary whit cane sugar to four parts water. You will need to boil the water for several minutes before measuring can retard spoilage in the feeder by a day or two; if you measure first, some will boil away and ruin the proportions. Stir in the sugar while the water is still hot and of course you should let it cool before filling the hummingbird feeder. If you have made more nectar than the feeder can hold, you can store the unused nectar in the refrigerator for up to two weeks. This mixture approximates the average sucrose content (about 21%) of the flowers favored by North American Hummingbirds.
