Hummingbird nectar recipe

The method

1. Measure. One part plain white sugar to four parts water. Audubon states it as a quarter cup of refined white sugar to one cup of boiling water; scale it up in the same proportion.
2. Dissolve. Boiling water dissolves the sugar completely, which matters — undissolved sugar settles and gives you weaker nectar than you think.
3. Cool completely. Do not fill the feeder warm. Warm nectar starts fermenting sooner, and hot liquid can warp plastic parts.
4. Fill and refrigerate the rest. Whatever you do not use goes in a covered container in the fridge. See how long nectar keeps.

That is the whole recipe. There is no step five, and any page that adds one is selling something.

The scaling table

The ratio-and-scaling question gets its own page if that is all you came for: hummingbird sugar water ratio.

Do you have to boil it?

Boiling is in Audubon’s recipe and it is worth doing, but for a narrower reason than people assume. It is not primarily about sterilizing the nectar — the moment you pour it into a feeder that has been outdoors, it is no longer sterile. Boiling is about dissolving the sugar completely and about starting with water that has had any chlorine driven off.

If you use hot tap water and stir until there is not a single grain left, you have functionally achieved the same thing. What matters far more than boiling is the cleaning schedule, because that is where fermentation is actually prevented.

What must never go in

Short version, with the reasoning on its own page:

• Honey. Audubon says plainly that honey can promote dangerous fungal growth. This is the most important line on the page.
• Red food coloring. Audubon calls it not necessary and says it could also prove harmful. Red on the feeder attracts birds; red in the nectar does nothing for them.
• Brown, raw or unrefined sugar. Use refined white sugar, which is what the recipe specifies.
• Artificial sweeteners. Hummingbirds are fueling flight muscles. A zero-calorie sweetener is not food.

The full explanation of each is on what not to put in hummingbird nectar, and the dye question specifically on is red dye bad for hummingbirds.

Fresh nectar in a dirty feeder is wasted nectar

This is the point most recipe pages never make. Getting the recipe right takes four minutes once. Keeping the nectar safe takes two minutes every few days, forever, and it is the part that actually determines whether your feeder helps birds or harms them.

Cornell’s guidance is to change sugar water every three to five days to prevent mold and deadly fermentation, more often in hot weather. Clemson’s extension service recommends refilling twice a week as standard and breaking the feeder down for a proper wash weekly with a four-to-one vinegar and water solution.

Which is why we recommend feeders on how fast they come apart rather than how they look. The cadence · feeders that make it easy.

Making a batch that lasts the week

Make a cup of sugar to four cups of water on a Sunday, keep it covered in the fridge, and you have most of a week of refills ready to pour. It saves the boiling step on every visit, which in practice is what keeps the change-cycle on schedule rather than slipping.