Oxidant | Engine is open for submissions year round. Submit up to five poems of any length.
For their BoxSet Series, submissions are open until June 1st. Submit a small collection of poems (10-15 pages) with an acknowledgments page and short bio. Individual poems may have previously appeared in other journals, but the small collection as a whole must be unpublished. Poems from your collection may not have appeared in chapbook or book form prior to submission to the BoxSet Series.
More here.