I put $70 worth of rye seed down all over spillway and dam after the pond was built. The dam had top soil spread on it and the rye and weeds sprouted very quickly over the summer. My spillway however is pure clay and I would say 50% of the rye sprouted. What can I do to help promote grass growth without hurting the pond. I wanted to put fertilizer down, but do not want to hurt the water quality with run off.

Any info would be much appreciated.

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