I'm going to ask my wife where she wants the door of her raised garden to be
Are you afraid of messing it up?
It makes no sense to put the door in the wrong place.
It is good to confirm where your wife would want her door, since this is being built for her. Double checking ensures you won't mess anything up.
I just want to do a good job.
As you said, this is a raised flower bed for your wife, so I think you are doing the right thing by waiting until she can confirm her desired location for the door. I hope that everything works out well with the rest of the construction.