If there is already text between poem tags on a page, it is possible to edit it in VisualEditor (albeit in markup), as is demonstrated in the sandboxed demo. But is it possible to put new poem tags on a page in VisualEditor to create a new poem? The only way I have found to enter poem tags is to switch completely to the traditional editor, which is unsatisfactory. Halfbeing (talk) 10:13, 5 February 2016 (UTC)
Topic on Talk:VisualEditor
Currently, you can edit existing poems, but you cannot add new ones. (You can usually copy and paste one, and then edit the copy, but this is also unsatisfying.)
I do not know when full support for poems will be available.