We do have morning glories in the database and you can post comments and photos to those entries, and others can see them and reply to them making threads. So in a sense we have a place for morning glories at ATP.
Is an entire forum warranted? Well, in the past 3 days only Linda has replied. I'd say that this is not at all a sufficient amount of interest to make a forum.
Feel free to discuss these kinds of plants in our All Things Gardening forum, which is a general purpose forum and definitely post your favorites to our database.