Snapshot DG or Sethoxydim or Ornamec (fluazifop)

Preen is trifluralin (treflan I think)
Snapshot has it too but also has isoxaben.
I have a bag of snapshot I am about to apply to my beds.
I will report how it worked next late spring. I will be reapplying it too.

 

We have decent weed Pressure in our mulched beds. Where we have weed blocker it has failed. I used Preen this year and it had some effect, but not great. I'm thinking of going with prodiamine for the lawn next spring and spraying the mulched beds too as a liquid app.

 

I have never tried any chemical pre-emergent in the gardens. A thick layer of mulch and hand pulling or glyphosate seem to work well for me. My wife let the vegetable garden get overgrown with nutsedge and wild onion. A layer of weed blocker and mulch wiped out 90% of them. The few areas that came back grew through the seams. For a perennial garden, it may make sense since you aren't planting every year. With annual or vegetables, you will need to renew the blocker at some point when there are too many holes from previous plantings.

 

I use Preen but always end up pulling weeds throughout the year. One area I put down more mulch and didn't really have much weeds.

 

I just put down prodiamine (my Pre-M). Didn't think of it before...see how this goes...my guess it should work better the Preen...

 

Used snapshot dg this year and very happy in most sections.

My perineal beds were a different story, they were fairly over run with wierd stuff. Its a full sun area so that promotes a lot of weed growth whereas established areas with my rhododendrons make a good thick canopy so there was minimal growth last year. I did apply gly in a few areas as expected. I don't expect it to be completely weed free.

Both areas did not have mulch.

Next year I will apply it earlier with my lawn preem (maybe even before) and spray prodimaine in the beds as well.

I havent been able to bring myself to spend a few grand on mulch though.