Today, April 5, I planted 6 hops rhizomes (2 each of Chinook, Willamette, Cascade) on the south side of the house, a few inches down in a compost/manure mixture and covered in mulch.
This is my third attempt at growing hops at home. The first year nothing came up. Last year, half the rhizomes broke through the earth only to be destroyed time and time again by a mix of lawnmower, gale force winds, and japanese beetle. I feel much more confident to combat all 3 this year.
Good luck. Once they start growing you might need containment. I might be able to help.