Here's what I did with some muck I got out of my pond. We'd topped a small hill when we built the pond to use for fill and as a result had no topsoil in that area. I plowed up the clay base that had proven not to grow much, spread maybe a 2 inch layer of muck over the top of all the busted up clay and let it sit for a summer. then I plowed it again and tilled it. Grows whatever I plant there now.

I think it's just like stated above....you gotta provide a medium other than muck to get growth...

Dale

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"When tempted to fight fire with fire, remember that the Fire Department usually uses water." - anonymous