The submission period for Frogpond is open from February 15 to April 15.
All submissions must be original, unpublished work that is not under consideration by a print or web-based journal. Full submission guidelines here.
Editor George Swede says via Facebook, "While posts on Internet sites such as Facebook or Twitter are eligible, posts on blogs are not."
I submitted to Frogpond for the first time last week, which was my submission for week 7 of 2011.