What are the effects of storing hops in the freezer?

Question

What are the effects of storing hops in the freezer?

Max

2020年5月26日 21:06

Two months ago I brewed an ale with three hops - cascade, northern brewer and saaz. I immediately put them in the freezer, but want to know how to best use them (if there has been any degredation).

So, preferably (to make this a complete guide) I'd like answers to the following questions:

How does freezing effect

Aroma potential
Bittering potential
Flavor potential

in the following forms of hops:

Whole
Plug
Pellet

My hops were whole, and frozen 30 minutes after opening the vacuum bag (in the same bag, but no longer with vacuum). I've read that I should add 30% extra bittering hops. Does flavor/aroma potential degrade more/less?

There is a similar question on this site, but it asks what the best way to store opened hops is, but not if the effect of storage is.

Topic storage hops homebrew

Category Mac

RBloeth · Accepted Answer · 2020年5月26日 21:06

According to the hops book from the great Brewing Elements series, if you store your hops pellets in the freezer in a vacuum bag, it should stay usable for up to three years in general. Loss of alpha acid will occur, but not too much. This is not true for fresh hops, though. I store my hops in a freezer at -16deg C and vacuum it always after use and am pretty content with it. The key factors here are oxygen and temperature.

Kevin Buckingham · Accepted Answer · 2020年5月22日 02:34

1

Kevin Buckingham answered at 2020年5月22日 02:34

Most varieties will safely store frozen for up to a year if wrapped tightly with low oxygen content. Beyond one year you will likely begin to see some degradation.

Ryan Shdo · Accepted Answer · 2012年7月11日 05:21

I think there is some great advice here but I listen to a lot of bodcasts and there is a particular Beersmith podcast called "hop chemistry" where James Altwies from Gorst Valley Hops gives some great info and mentions that they freeze their hops at an insanely low temp.

brewchez · Accepted Answer · 2011年9月15日 19:30

You questions are good ones, unfortunately the effect of storage is somewhat variety dependent. Some hops store better than others, so there is no definative answer there. I will say that the effect is not broken into aroma, flavor or bittering either, seeing how its all based on the storage effect on the gland of the hop. Aroma, flavor and bittering all come from the same place, its the boil time that really determine what you are getting from the hops.

In general, there may be some statistics out there that give the degradation rate of each variety under certain storage conditions. I haven't seen a clear chart or table with that data though.

I have stored hops in the opened mylar bag I got them in wrapped in a sealed ziploc in the freezer for a couple years and not really noticed a huge change in bittering potential.

30% figure seems high, but its time dependent too. The hops slowly loose their alpha potential with time. A month later you probably don't notice the change, a year later...maybe.

Denny Conn · Accepted Answer · 2011年9月15日 15:51

The freezer greatly slows degradation of the hops. I've never experienced any negative effects from storing hops in the freezer. It's the preferred method of storage. The absolute best thing you can do is vacuum seal them before storing them in the freezer. Barring that, using a resealable bag that you remove as much air as possible from will work well.

What are the effects of storing hops in the freezer?

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