Westside Theatre, New York Killer performances from Jonathan Groff and Tammy Blanchard bring a revival of the 1982 tale of a bloodthirsty plant to vibrant life The musical comedy our climate-denying age requires, Howard Ashman and Alan Menken's 1982 tale of a plant bent on human destruction blooms again off-Broadway. Funny, schlocky, nutty and sad, it's a show about falling for (and sometimes into) the wrong guy or t…