Sugar Additions

When do you add your sugar additions? In the boil, in primary, or in multiple steps?

 

All of the above. It depends on how much and what you are brewing. If it's a pound or two normally I add it to the boil. If it's more than that I spread it out.

I have done multiple sugar additions to primary...My saison had 1 pound of home-made cadi syrup, and my strong had 3, 1# additions (the first in the boil)...I then usually wait til the first krausen falls, then add my sugar syrup addtition...if it is more then one addition I do the same thing, add each addition after each krausen falls. SO for the Belgian I had three krausens rising and falling over the course of fermentation.

The idea is not to inundate the yeast with too many fermentables at one time, which could result in poor attenuation and remaining fermentables left behind, and/or tired stressed out yeast (which clould lead to off flavors). You let them digest all the complex sugars in the wort. Give them a bit of a rest by waiting for the krausen to fall, then give them the simple sugars as a treat.

That way even if they didn't consume all the complex sugars initially, and your attenuation was a bit poorer than you liked, getting them up again and working on the simple sugar will also get them eating any left over complex sugars as well.
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If you add a ton of sugar up front the yeast won't consume the maltose, instead they'll just eat up all of the sucrose or dextrose or whatever simple sugar you are adding.

Wait until fermentation slows (a sign the more complex sugars have been eaten already) and then kick start the fermentation again with your sugar addition.

If you are using honey or other natural sweeteners you can add them to the boil to avoid any risk of infection.

Also be sure your yeast can handle the ABV your beer will be at when finished.

 

I vary it depending on the OG of the malt aspect of the beer. If it's a normal strength beer and I'm adding a pound or so, I'll do it in the boil. If it's going to be 1.080 or up, I feel more comfortable letting the yeast get a good start first and adding sugar as the fermentation slows down.