"Steve B" wrote in message
.. .
Anyone use it? Any secrets? Caveats?

Or just RTFM and follow?

Gotta go do some Roundup, and am looking forward to seeing what this
pre-emergent herbicide can do.

This is an international newsgroups and product names are not always used
universally. Preen in my country is a laundry spray. That works very well.

IF you do not mean a laundry spray, perhaps you could tell us the name of
the active ingredient and the mix rate. This information is on the side of
all labels for garden herbicides/pesticides etc.