Weed killer after top-dressing & seeding

[coolbrze]

Can you apply a post-emergent broadleaf weed killer after top-dressing a lawn & seeding or should you wait until the seed has taken & is semi-established?

[RigglePLC]

In my experiments last year. I used Lesco Eliminate (Similar to Horsepower) when new grass was 1.5 inches tall--no injury resulted.

Label recommends to wait until it is mowed twice.

Or...did you mean you wanted to spray before germination? Has anybody tried that?

[maleaco]

Yes usually you can if you follow directions maybe even a little less than directions for saftey

[coolbrze]

It was someone we saw applying it last week while working across the street from us. They top-dressed the lawn w/ compost, seeded it, then applied a granule broadleaf weed killer, I can't remember what it was though. I didn't say anything but was wondering how that would work out w/ the seed germinating...

[RigglePLC]

Experiments I conducted in August of 2011, found that seed sowed 3 days after spraying bare soil with Lesco Eliminate herbicide germinated adequately and were only about a quarter inch shorter than untreated soil.
T-Zone treated soil still showed some stunting and reduced germination, when sowed up to 5 days after spraying.