View Full Version : pre-emergent in rock beds?

02-20-2006, 07:36 PM
do you guys apply a pre-emergent or preen to rock beds. does it work?

02-20-2006, 07:37 PM
Preen is illegal and off the shelf in Calif..but yes it works

02-20-2006, 07:48 PM
i think preen is merely trifluran,
there are lots of other pre-M's that will work very well

Triple R
02-20-2006, 09:59 PM
Preen is illegal and off the shelf in Calif..but yes it works

I checked the CDPR website and it's still registered.


02-20-2006, 10:03 PM
Gee I am sorry I was under the impression by second hand information that it had been banned..
check my sig line GreenFrog

02-20-2006, 10:44 PM
actually greenfrog...
as much as sheshovel's sig line is quite accurate.... this time i think she is right...(oh my gosh... i actually said that :) )

when i googled preen to try and verify that it was trifluran, on the preen website it says "NOT FOR USE IN CALIFORNIA"

Triple R
02-20-2006, 11:08 PM
I didn't see it on the label and the registration for CA is still current.

This is the link I used for the label and my previous post has the link for CA registration.


I will admit that I still could be wrong especially since I have never used Preen. I did see it last spring at Costco though.

02-20-2006, 11:39 PM
I think were all right and somebody screwed up bigtime somewhere.!

02-21-2006, 01:21 AM
What about snap shot? might be banned in Cali too don't know.

02-21-2006, 09:47 AM
Granular pre-emergent chemicals work very, very well. Use it in rock, under bark, and on any beds where the customer is too cheap to want bark. There are other products besides Preen. Make sure whatever you want to use is not banned in your state, first. Always keep everything legal and you'll sleep nights.

02-21-2006, 09:00 PM
i totaly disagree about granulae pre-m's.. we have great success with them... we use xl2g, snapshot, barricade,team pro, and pende.
all work very well..

02-22-2006, 07:03 AM
Of course you can use it over stones, but be aware of the increased run off and dig down and see if there's any WB or plastic. These will affect absorbtion. Granular is good. Liquid is better. Especially on hills.

02-24-2006, 01:18 AM
What about snap shot? might be banned in Cali too don't know.

It's the same thing (AI)...just a different concentrate. Both contain Trifluralin and Isoxaben (atleast that's how I THINK it's spelled) lol:)