Weed Prevention Near a Stream

May 31, 2023
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Woburn, MA
United States
I've been putting a lot of effort in to my yard for the past 5 years or so, and the results have been great:


However that dark area towards the back left is a 10 or 15 foot drop off down to a stream. I have a small patch of land around that stream. I've been cutting branches and giving lights a path to shine down there. Very soon I plan on planting grass, as I just finished cleaning up decades worth of brush down there.


BUT from what I understand, either the week preventer, or the fertilizer (?) are very bad for water sources. So is there some other way to prevent weeds down here? They grow out of control. I know a thick healthy lawn will help, but I don't think that will be enough down here. Even in this picture, all the bare spots are areas where I just pulled weeds. This whole thing was covered in green that all popped of from nothing over the last couple of weeks.

So the question is, what can I do down here to help grass grow, help prevent weeds from growing, without killing everything in this stream, and the larger river and lakes that this stream empties in to just a few miles away?

This same stream passes right through the middle of a bunch of really gigantic yards down the street. I'm sure they fertilize their whole lawn without giving much thought to protecting runoff into this stream. But still, just because they're doing it doesn't mean I have to do it.

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