Our community development,, Spirits Reach, is restoring the native grasses in the disturbed soil areas of the development. Two years ago, the disturbed soil areas were hydroseeded with 5 native grasses. The black meddick seems to be overtaking most of the areas. We have pulled some plants. We are trying to avoid herbicide (to be chemical free). We have had a suggestion to use a fertilizer that would make the grasses grow but not the black meddick; change the composite of the soil. Will this idea work? Any suggestions on who/where to go to talk about this idea.