Hi I'm new and have a question, Im using canned cinnamon apples someone told me I didn't need to use yeast just add sugar and water, so the Jars have been sitting for 3 weeks now is it to late to add yeast any advise will be gratefully appreciated
sometimes you can catch a good wild yeast, but if you are not using fresh fruit, usually you have to introduce the yeast.
As for what to do now, a few questions:
1) is the container open? Just covered with cloth? what?
2) how does it smell?
3) try a spoonful, how does it taste?
Three weeks in an open container is probably spoiled, but I can't be sure. I would be very surprised if something has not happened to it; either fermentation or spoilage.