When can I take the seed pods off and plant them
I don't know what kind of Wisteria you have, but mine, which is a Japanese one, takes a long time to ripen the seeds. The pod will become hard and dry once they ripen, but they hang on the branches even when ripe so don't worry, they won't disappear on you.
How do you plant them bc I read online that you are suppose to soak the seeds before you plant them and then romove the other layer so that it can grow. I have tried soaking them but they are still as hard as a rock