A07 Flagship - Imperial Organic Yeast

A07 Flagship - Imperial Organic Yeast

In Stock
60 day no hassle return policy. Details

A07 Flagship is a versatile strain prized by home and craft brewers alike for its tremendously clean character. A07 Flagship performs well at conventional ale temperatures, but can be used in the low 60s to produce remarkably crisp ales. Due to its middle of the road flocculation, filtration or fining is required to achieve a crystal clear beer.

  • Temp: 60-72°F, 16-22°C
  • Flocculation: Med-low
  • Attenuation: 73-77%
  • Cell Count: 200 Billion

White Labs Equivalent: California Ale – WLP001
Wyeast Equivalent: American – WY1056

Usage Instructions:
  • ​Store refrigerated until ready to pitch
  • Shake and kneed pouch to homogenize slurry
  • Sanitize the sealed pouch
  • Open and pitch entire contents into well-aerated wort

Please Note: For best results we Always recommend ordering an Ice Pack with your liquid yeast. Ice Packs can be found below in the "You might Also Need" section.


Item # IYA07
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.37 LBS
Community Q&A

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Browse 2 questions Browse 2 questions and 50 answers
Why did you choose this?
MoreFlavor Store
I have heard great things about this yeast but haven't tried yet.
Jesse K on Sep 4, 2020
Trying to follow 3 Floyd's recipe with the yeast they use
Ryan C C on Jun 30, 2020
I have heard great things about this yeast but haven't tried yet.
Jesse K on Sep 4, 2020
ferment beer
Ryan Jones on Jul 16, 2020
Trying to follow 3 Floyd's recipe with the yeast they use
Ryan C C on Jun 30, 2020
I need yeast, my LHBS is out of business
Michael Brierley on May 3, 2020
It's yummy
Joshua W on May 2, 2020
It is appropriate for the beer that I am brewing. I love using Imperial!
Ed F on Apr 29, 2020
imperial yeast is the best
Rob S on Apr 29, 2020
I've never used Imperial before and wanted to see if the higher cell count will make any difference in the final product.
John M on Apr 27, 2020
Love it!
Santiago on Apr 25, 2020
used liquid yeast before. convenient
Gregg S on Apr 23, 2020
for the porter
Matthew J on Apr 10, 2020
Robert on Apr 8, 2020
I live I portland where this is made but wanted to increase carbon footprint
Jonathan on Apr 8, 2020
I like it
Michael H on Apr 7, 2020
worked well in the past
J C on Apr 1, 2020
clean crisp qualities
John C F on Mar 31, 2020
I want authentic malt for a german style.
Valued C on Mar 30, 2020
Like this brand
Scott M on Mar 21, 2020
Because Imperial Independence wasn’t available
Jonathan on Mar 18, 2020
Trying this brand for the first time
Robert F G on Mar 18, 2020
My go to ale yeast
Richard Schramm on Mar 17, 2020
I have used it before and had great results.
David C on Feb 13, 2020
recommended yeast
gabriel l on Feb 5, 2020
Trying this and going to compare it with WLP001 out of curiosity
Eric Hansen on Jan 22, 2020
Love Imperial
JOHN C on Jan 10, 2020
I've heard it's awesome and I'm making a West Coast style Pale Ale that will be dry hopped with a lot of hops :)
Paul R on Dec 31, 2019
I don’t need a starter with this, for most beers anyway.
Daniel M C on Nov 8, 2019
great yeast
Ryan Tedlock on Nov 5, 2019
I like organic yeast
Zach B on Oct 23, 2019
Susanne c on Oct 23, 2019
My new favorite
douglas m on Oct 23, 2019
Great Yeast!!
Brian M on Oct 22, 2019
try it out
Tim P on Jul 8, 2019
Per recipe
Rick G on Jun 12, 2019
try new thing
Richard 1. on May 20, 2019
Great Yeast
Daniel K H on May 14, 2019
I know what Flagship will do, Great Yeast
David Ayers on May 2, 2019
Jakub C on Apr 28, 2019
Christopher M on Apr 27, 2019
Best yeast producer ever.
Tim D on Apr 15, 2019
Brulosophy talks about it a bunch!
Rick R on Apr 10, 2019
This is the best
Cody P on Apr 5, 2019
trying something new
Robert Borsdorf on Apr 4, 2019
Organic and 2x the cells
Zach B on Mar 11, 2019
try something new
Charles G on Feb 27, 2019
Trying something new
Joshua W on Feb 26, 2019
I love a nice dry west coast ale
Joshua G on Feb 25, 2019
good product
Craig P on Feb 19, 2019
Used before with great results.
Edward J Csaszar Jr on Feb 13, 2019
Heard about it on Brulosophy. Want to give it a chance.
Karl Knudsen on Feb 9, 2019
ferment beer
Ryan Jones on Jul 16, 2020
I need yeast, my LHBS is out of business
Michael Brierley on May 3, 2020
The A07 Imperial pouch arrived swollen. I hadn't seen an Imperial pouch swollen before. Is the yeast still healthy? Or should I return it?
Seyed Mirhosseini on Aug 21, 2020

4.6 / 5.0
21 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
great yeast
Great yeast finishes clean
September 15, 2020
1 year ago
Fantastic yeast, chugs quickly and cleanly
The Imperial yeast brand is my favorite to use and I used Flagship for a hoppy pale. With a starter and stir plate, the yeast was ready to go and ferm was done in 3-4 days (1050 SG). Fantastic yeast.
May 13, 2020
4 months ago
Amazing yeast and company. The viability of Imperial yeast packs is incredible. I always make a starter and the amount of slurry I get from an Imperial yeast pack is epic. I usually pitch on the low end of the temp range and still need to deal with blow offs. Great product and company.
April 28, 2020
5 months ago
Great Yeast
The Lag time on this yeast was less about 16 hours. All 200 billion yeast cells are hard at work. Cannot wait to try out the flavor that this adds. Will buy again!
April 13, 2020
5 months ago
Made the beer!
February 15, 2020
7 months ago
Normally I get a starter batch going a few days before brew day but I was pressed for time. Pitched this yeast right after transferring from the brew kettle to my Fermzilla. Pitched at about 71 degrees. Fermented under natural pressure (capped at 14PSI) for 1 week. My reading this morning had be at about 79% attenuation on my Pliney the Elder clone. My O.G. was 1.069 and todays reading is 1.014.

Took a sample of the beer along with the hydrometer reading and it is a solid brew, no funky flavors just all my hops I added.

During the fermentation from day 2 to day 5 the yeast were eating so furiously I had to show my wife and kids. My 7 year old asked me to explain why there was a tornado of activity in the fermentation tank.

Highly recommend! I will try this strain again with a bigger DIPA.
January 31, 2020
8 months ago
Great yeast works fast but wish there was a warning for new brewers . After using this yeast for the first time the foam (Krausen) was pouring out of the airlock. I bought another fermenter a 7gal one to avoid this and use a blow off tube for my 6 gal fermenter. I learned about top cropping yeast so I do this each week with this yeast.
January 22, 2020
9 months ago
Aggressive fermentation and hits FG every time. My go to.
January 13, 2020
8 months ago
Buy again!
Got a fuller and slower fermentation than some more expensive supposedly higher alcohol resistant yeast!
January 10, 2020
8 months ago
Imperial yeast is the best yeast brand I have found! No need for a starter. No need to smack a day ahead of brewing. Fast stars and fast finish. Flagship is great clean yeast that lets malt and hop flavors stand out!
January 1, 2020
over 2 years ago