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Flavor/Aroma hops - adjust for AA% or no?

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erockrph:

--- Quote from: hopfenundmalz on May 07, 2012, 08:53:42 AM ---The IBUs from late additions can be high if you put a ton in. You get aroma from dry hopping, not much bitterness.

For flavor and especially aroma, you might look at the essential oil content for the hops.  In your 2 hops listed, Fuggles =0.44 - 0.83% and Columbus =1.5 -2.0%. Citra is alway called intense, well it is at 2.2 - 2.8%, which is pretty high.

I can't tell you what to do, as it is recipe, equipment and process dependent. You can try different amounts for different beers and find out what you like.

http://www.freshops.com/hops/usda-named-hop-variety-descriptions#usda_id_19209
http://www.usahops.org/index.cfm?fuseaction=hop_info&pageID=8

--- End quote ---

Ahhh... that sounds like what I was looking for. I'm not too concerned about bitterness since I almost always do a 60-minute addition and would adjust that to hit my target IBU's as I tweak my late adds. I was wondering if AA% typically correlated with flavor/aroma contribution, but the oil content is probably a much better marker for that.

nateo:
There is a correlation between high AA% and high oil levels, but it's not a causal relationship, and there are definitely examples of high oils and low alphas, and vice versa. 

hopfenundmalz:

--- Quote from: nateo on May 07, 2012, 10:25:19 AM ---There is a correlation between high AA% and high oil levels, but it's not a causal relationship, and there are definitely examples of high oils and low alphas, and vice versa.

--- End quote ---
Yes.

For the OP. Smell your hops, look at the data, make a guess on the finished beer.  Brew it agian with adjustments if you need to dial it in.

erockrph:

--- Quote from: nateo on May 07, 2012, 10:25:19 AM ---There is a correlation between high AA% and high oil levels, but it's not a causal relationship, and there are definitely examples of high oils and low alphas, and vice versa.

--- End quote ---

So if you had to make an educated guess and you had a batch of hops that was at the high end of its AA% range, would it be safe to assume it was likely at the high end of it's essential oil range as well?

skyler:

--- Quote from: erockrph on May 07, 2012, 11:30:26 AM ---So if you had to make an educated guess and you had a batch of hops that was at the high end of its AA% range, would it be safe to assume it was likely at the high end of it's essential oil range as well?

--- End quote ---

Not really. A better assumption would be that "newer" varieties generally have a higher oil content than older and more established varieties. But even better would be to just go here to http://www.usahops.org/userfiles/file/HGA%20BCI%20Reports/HGA%20Variety%20Manual%20-%20English%20(updated%20March%202011).pdf check the oil content of the hop variety you're interested in using.

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