I pruned the main branch of my (7') weeping willow tree last year too low (I'm guessing) and now the main branch is about 3-5" off center. The tree is now about 12-14' high.
Is this a problem? If so, how do I correct it?
Now that there is a photo to work from I feel confident that this is not a problem. Yes, it probably would have been better to leave a leader but with the fast growth willows have one branch will end up becoming the new leader. I think one of the side branches is already tending upwards. It just needs a little help. See here for corrective pruning practices which include
In general you should follow these points with weeping willows (Salix babylonica):
Something else to keep in mind is that weeping willows get quite large (20–25 m or 66–82 ft). They have brittle wood and drop branches all the time. This is not a plant you want close to your house or near anything that can be damaged by something large and heavy falling on it.