From: Imperial Yeast
Type: Yeast • Packet: Liquid
Species: Saccharomyces cerevisiae var. diastaticus
STA1 gene: Yes
Wild saccharomyces yeast strain known to produce a huge citrus fruit ester profile. Citrus cranks out orange and lemon aromas along with some tropical fruit. Use this strain at high temps for big ester production. A wild saccharomyces strain, it will get a bit funky without the worries of a brettanomyces strain. Keep an eye on your fermentations, it does like to hit a false terminal and then slowly finish out the rest of fermentation. This strain tests positive for the STA1 gene via PCR analysis and is therefore considered to be Saccharomyces cerevisiae var. diastaticus
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Brewing Properties of Citrus
The functional properties of brewing yeasts have a direct impact on the performance, quality and economics of the resulting beer.
The alcohol tolerance determines the ABV at which yeast cells go dormant and stop fermenting.
Attenuation refers to the percentage of sugars converted to alcohol and carbon dioxide, as measured by specific gravity.
Flocculation refers to the tendency of yeast to form clumps called "flocs" that drop in order to make the beer clear.
The optimal temperature is the range in which the yeast performs best without putting off any off-flavors. Pitching the yeast into wort usually happens at the low end of the temperature range.
Comparable Beer Yeasts
If you cannot find Citrus (A20) anywhere, you can substitute one of the following yeasts for a similiar result.
Common Beer Styles using Citrus
These are the most popular beer styles that make use of the Citrus yeast:
Hazy IPA, American Pale Ale, Imperial IPA, Red IPA, White IPA, Red Ale, American Wheat Beer, Black IPA, Robust Porter, American Stout, Winter Seasonal Beer, American Barleywine, Imperial Stout, American Strong Ale, Wheatwine, Cream Ale & Blonde Ale
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