Composting water hyacinth after herbicide
Let me get your take on something. I have a large creek that runs through the back of my property. It gets choked with water hyacinth on occasion. Last year, in the spring, our county had it sprayed with an herbicide, what type I don't know. I wish they would stop it. The water hyacinth is coming back. Before they started spraying, I was able to gather up a large amount and compost it with dry leaves. My vegetable plants loved it.
My question is this. How long does a typical herbicide that is used on water plants stay around? I would like to gather a bunch more water hyacinth before they spray again, but I'm not sure a year has been long enough.