I have a big bag of ~50 jalapenos in my freezer, frozen less than a day after being picked. How long will they last in there, and how will I know they've gone bad?
2 Answers
First off, pretty much everything stored in a properly cold freezer (0°F/-18°C) will be safe to eat forever.
The flavor will eventually go, e.g., by getting freezer burn and also by enzymatic degradation (if not blanched). How long this will take depends on exactly how you've stored them. In general, airtight packaging with no air inside seems to be best. For example, vacuum-sealed thick bags work well. Cheap, thin plastic "storage" bags don't work well. You can get around 8 months according to UNL. Colorodo State believes you can get 12 to 18 months.
edit: It also occurs to me that it matters what freezer you're using. The one on my fridge, for example, has fairly large temperature swings (yet mostly stays below 0°F) and automatic defrost, it freezer burns things much quicker than my chest freezer (which has a temperature variance of maybe 2°F, staying in the -3° to -1°F range)
I have a bag of frozen Jalapenos from 2008 that still have a good flavor and spiciness. They'll last about as long as you can stand to not eat them, as far as I can tell.

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Great to know, as I rarely break into them. – Ben Brocka Oct 26 '11 at 01:33
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That's pretty good. Care to post method you're using (blanched/unblanched, frozen whole/sliced, what packed in, etc.)? – derobert Oct 26 '11 at 08:29
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Whole, raw, put in a freezer bag and put into the freezer. My parents packed them, so I don't know if they were rinsed or not. – baka Oct 26 '11 at 11:18
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@derobert it was my impression that hot peppers aren't supposed to be sliced or blanched before freezing – Ben Brocka Oct 26 '11 at 16:02
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1@BenBrocka: I believe they can be, but neither is really required. Slicing allows denser packing. Blanching seems to be recommended when the eventual use is going involve cooking the pepper anyway. – derobert Oct 26 '11 at 16:32