This is late notice for this year, but the Horror Writers Association has a dark poetry scholarship - $1,250 - that they offer annually. June 1 deadline.
"...the intent of the Dark Poetry Scholarship is to bring into prominence the very real importance and influence Dark Poetry has had on the Horror genre, “It is very clear to the HWA that there are real barriers limiting the amount of Dark Poetry being published. At the same time the HWA exists to extend the horror genre in all its aspects, so we are establishing the Dark Poetry Scholarship..."
This scholarship is focused on education for poets writing dark poetry (not necessarily horror).