A stuck fermentation is when the yeast stop fermenting early, leaving the final gravity reached considerably above the expected final gravity. Can be caused by temperature swings, poor yeast condition or using a strain with insufficient alcohol tolerance.

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Re fermentation

I have 2, 6 gallon carboys, one apple & the other peach. The apple is bubbling really good, the peach not at all from what I have seen. Can/should I add more yeast or sugar to kick start it?
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Brew from an out of date kit - not fermented

I kicked off a wildly out of date (2008) brew from a kit a few weeks ago. ( One of those kits with a packet of yeast and 2 large tins of goop.) The brewing didnt go as well as I've had them go ...
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Is my fermentation on the right track?

I upgraded my equipment and estimated my new efficiency a bit too low, so the imperial IPA that I brewed on 11/30 ended up having an O.G. of 1.10 (supposed to be 1.09). I made a two step starter with ...