Last year I got a pickup load from a local chicken house that was pretty fresh, and put it in the garden in Feb. I spread it out and tilled it in within a couple of days. I planted 6-8 weeks or so later, and had some monstrous bean and pea plants.
Unfortunately, the weeds loved the extra nitrogen as much as the crops did. BUT, then the chooks loved all the extra weeds I pulled out of the garden, so.....