A07 Flagship - Imperial Organic Yeast

A07 Flagship - Imperial Organic Yeast

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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 35 answers
Why did you choose this?
MoreFlavor Store
I don’t need a starter with this, for most beers anyway.
Daniel M C on Nov 8, 2019
I like organic yeast
Zach b on Oct 23, 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
great yeast
Ryan Tedlock on Nov 5, 2019
Susanne c on Oct 23, 2019

3.9 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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
2 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
8 months ago
Took off same day in a 1.071 black ipa no starter needed!
February 23, 2019
9 months ago
My new go to yeast!
Talk about bang for your buck. I make large starters and get a number of brews out of one pack. This yeast takes off fast and finishes fast as well.
I usually ferment at 65-66 and get a very clean beer with hops that shine.
June 13, 2018
1 year ago
Great stuff! Fast start, great attenuation, great finish
May 29, 2018
1 year ago
Great yeast - Explosive entrance!
I shook up a can of this & opened it! WEAR GLASSES to protect your eyes! It did blow! However, in the beer it was on fire! This product launched against a 1.068 OG & finished out in 8 days at 1.043 FG. Two weeks later I was enjoying a might fine dark porter! I would recommend this product but I caution, it's entrance will be one to remember!
March 14, 2016
Blew up in my hand
I shook the can for 15 sec per the instructions and gently cracked the top. Like a grenade it literally exploded in my hand. Extremely painful and yeast was on the walls, ceiling and floor. Waste of money. If you think it was a one time thing think again. I took a second can I bought and opened it up from a distance with a crow bar outside and BAM exploded yet again. Do not buy this product.
December 9, 2015
Great Yeast
This stuff is amazing! I pitched 2 cans of this into a 5l starter for a 15 gallon batch of an Imperial IPA which in got done in 11 days. Harvested the yeast after primary and did another 5l starter to pitch into a 1bbl 1.115 Barley Wine and it finished it out at 1.029 in 20 days. Thoroughly impressed with the yeast but will have to get used to working with the can, it is pretty difficult to get all of it out. I would suggest leaving these out for a while to warm up and giving them a good shake once warm and then allow them to resettle then open. I had one can explode all over and another one that didn't, both from the same manufacturing date. For the price of the can only being $3 more than competitors and getting double the cell count is great if you are doing larger batches and need a lot of yeast without breaking the bank. The IIPA came out pretty clear after sitting in the fridge, not crystal clear but pretty close.
November 15, 2015
Great Yeast! Novel concept. Needs some tweaks.
I used this "flagship" yeast in a 11 gallon batch of 1.064 wort that was properly oxygenated at a temperature of 68 degrees. Healthy fermentation in less than 12 hours and peaking at 18 hours. This beer is still fermenting and overall I am pleased with the performance of this product. The only surprise is that the entire lid of this can pops off when the tab is pulled. I did not look, and only assumed (yeah I know...) that there was a mouth to the can. So far so good. Will update as required.
October 17, 2015
Amazing yeast in an unreliable package
Five stars for the yeast itself; I've never had yeast start up so quickly! I had to take a star away for the terrible can. I did not shake the can but the internal pressure caused significant blow out as soon as I tried opening the tab. Speaking of the tab, it's flimsy and poorly placed. It does NOT adequately open the can. I don't know if this is because of placement or because it's so flimsy. Either way it severely needs to be addressed.

I'll continue to use it on account of how awesome the yeast performs but I'll be keeping a can opener handy.
October 12, 2015