Am using this new cold spell to plant fava beans (actually a Vetch) for the first time in years. Since they loved Denver's heavy, wet and sticky bentonite clay soil I heavily amended the soil in a 1/3 drum Water Wise Container Garden with cheap kitty litter made from calcium bentonite clay, added a few inches of aged oak chips, planted about a dozen, deep soaked with rain water. Incredibly cold hardy crop. The black and white blooms are stunning!

http://www.everwilde.com/store/Fava-Broad-Windsor-Fava-Bean-Seeds.html