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Flagship is the classic American ale strain. Neutral with medium flocculation and attenuation rates, this is a well-balanced yeast strain that can be used on a wide range of ales, from IPAs and pale ales to Russian Imperial Stouts. This strain can allow both hops and malts to come through. Due to the neutral nature of this strain, it is often used in American style pale ales and IPAs. With such versatility, it makes a great house strain!


We include complimentary ice packs with ALL liquid yeast orders (if required), but cannot guarantee that the ice packs will stay cold during transit, and thus the yeast can potentially be exposed to hot temperatures. We highly recommend ordering dry yeast during the hot summer months or if you are ordering from a warmer climate. Many times during the winter an ice pack is not needed so we make the determination based on current temperatures and the destination!

Yeast Specifications

Temperature Range: 60-72 F
Flocculation: Medium-Low
Cell Count: 200 Billion
Attenuation: 73-77%

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In-stock orders in by noon usually ship out same day! If there is a delay, we'll let you know ASAP.
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Great stuff!
If you don't make starters you'll love this stuff! I've tried this one and the B56 Rustic both are amazing. I'd highly recommend this product! Cheers!
Jul 5, 2017  |  By Paul Simmons
True to its description!
Used this on the Hearts Squared AG kit. True to form, this yeast did its job and allowed the malt and especially hop characters of the beer to take center stage. Did another batch with S04 and it's just not the same--I'll take A07 for this beer every time!
Apr 8, 2018  |  By Bob C.
Owner Response: Couldn't agree with you more, Bob! Imperial Yeast is definitely our favorite right now and we love recommending it to customers. Glad to hear that you are having equally good results with it. Cheers! Bryan