Quote:
Originally Posted by Polar Bear
I'm considering trying Preen, so I'd like to know if you used it on existing weeds? Or was it on a clear area as a preventative?
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I read that preen is used in the soil and acts as a pre emergent to stop the seeds from growing. You water it in and it forms a barrier. The fall is a good time for this to stop the spring growth of new weeds. I use a regular roundup weed spray in my beds and where I have a fence line.