Hi Arcadia, welcome to permies. Do weeds count as a cover crop. I live in the MD state. I have 4x8 garden beds, I have been layering materials as I come by them, grass clippings, mulch, etc. I clear an area, plant, and use pulled weeds as mulch. Not very conventional, but I decided I wasn't going to fight the weeds. Sometimes, pull weeds, cover with newspaper, then mulch. It works for me.