Pitimpinai, when in Colorado (93-15) used neighbors stable sweepings. After digging out a slight hill, built a 3' high stacked block retaining wall, 40' long, atop of the dig out. Filled the space, often 1-1.5 ' wide x 3' high, from neighbors pile of stable sweepings--some fresh & some aged. Following yr had nothing but worm castings. Never saw any weeds for next 2 yrs, I then moved. Only problem was that I did not put a plastic tarp between retaining and the worm castings leaked from between the stacked block into the plant bed below.
