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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 1 question Browse 1 question and 47 answers
Why did you choose this?
MoreFlavor Store
worked well in the past
J C on Apr 1, 2020
I want authentic malt for a german style.
Valued C on Mar 30, 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
To compare it to wlp001
James S on Jan 25, 2019
Doing an Imperial IPA
Adam R on Jan 19, 2019
Imperial is the best yeast
Steve T on Dec 27, 2018
Worked well the first time. Let’s try again.
Kevin S on Dec 15, 2018
Previous used
HRB on Dec 14, 2018
Helen K on Dec 6, 2018
Trying a new yeast
Robert G on Nov 17, 2018
Love Imperial
Mark H on Oct 22, 2018
It’s in the right temp range for me
Richard G on Oct 15, 2018
Imperial is AWESOME!! Organic, small/home brewers are their priority, double the cell count, and good people!!!
Aaron M on Jun 26, 2018
Cannot find locally and Imperial yeast is the best I don't have to make starters with it
Azael D on Apr 26, 2018
clean crisp qualities
John C F on Mar 31, 2020
Like this brand
Scott M on Mar 21, 2020

4.5 / 5.0
17 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Made the beer!
February 15, 2020
2 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
2 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
3 months ago
Aggressive fermentation and hits FG every time. My go to.
January 13, 2020
3 months ago
Buy again!
Got a fuller and slower fermentation than some more expensive supposedly higher alcohol resistant yeast!
January 10, 2020
3 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
1 year ago
Seems to have done the trick
I was a little worried cuz the yeast was a bit old. I made a yeast starter since I was trying a DIPA. Woke up the next morning and the wort had blown the air lock off and it was frothing out. Transferred to secondary after two weeks and the gravity seems to be where it's supposed to be. So, I think this yeast is good if it can handle DIPA duties. Won't know for sure for a few weeks.
December 3, 2019
4 months ago
Fastest Starting Yeast I have used
I made a 2000 ML starter with my yeast because it was a little warm when it arrived. I sat in the fridge for about 4 days before I got a chance to brew. I pitched in in the late afternoon and when I got up the next morning I was amazed at the amount of blow off I had, definitely needed a larger jar or bucket for this one. This was Fastest Starting Yeast I have used!
October 10, 2019
7 months ago
My first time buying this yeast and it did an amazing job. I will be buying this brand more often.
March 15, 2019
1 year ago
Took off same day in a 1.071 black ipa no starter needed!
February 23, 2019
1 year ago