I am wondering if it is a good idea to apply Ronstar granular preemergent herbicide to bare (clay) soil before laying sod. One source (i.e.,a landscape contractor) has told me that it will not interfere with the establishment of the new sod (90% tall fescue & 10% Kentucky bluegrass) and another (i.e, the folks at the sod farm where I will be purchasing the sod) advise against it. You would think that both sources should agree on this--but they don't. Maybe the sod farm person is just doing a CYA???

I have read from university bulletins that *some* preemergent herbicides will mess with the sod's rooting. The operative word here is "some". I am now wondering if the specific product, Ronstar, falls in that group.

So, hopefully from this post I will hear about the success OR failures of those folks that have actually tried Ronstar before laying their sod. Thanks in advance for any information you have on this.

Tom