Hi
@toxiczombi
Do you definitely want to grow something in this space? I can't think of a maintenance-free ground cover plant. Weeds will invade just about anything.
If you don't care about growing anything, you can buy a soil sterilant that will kill any and all plants growing in the treated soil. Even nutsedge! It's effective for at least one year. Be sure no desirable plants, including trees, have roots in that area. You could put down bark mulch and treat it too. I would avoid the temptation to use a "decorative" rock mulch on the bare soil. Sooner (probably) or later it will need maintenance - removing debris that lands on or is blown onto it. Easier to use a leaf blower or rake with bark mulch.
Otherwise, I'll second Arlene
@pirl, a ground cloth covering for a year would be good preparation for any attempt to plant in your narrow space. It may not be long enough to eliminate the "nuts" underground but it's worth a try. To allow the cloth to lie flat, you may have to spray the weeds with weed killers first and remove the dead tops.
And I'll second Ken
@kenisaac's questions - we need more information to suggest what might grow there.
Good luck!! Let us know what you try.
Pat
