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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stuck fermentation/lowering acidity

I am having trouble getting a batch of wine off the ground. Its a three gallon batch of Lemon wine and fermentation just wont start. My SG is 1.09, temp is stable at 75, acidity is at 3.0 using those ...
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Must won't ferment, too sour?

I prepared a must for a mead last weekend (recipe below) and after a whole week there has been no fermentation activity. I took a pH reading and it came in at 4.4 - is it likely that the must is ...