Residual 2,4d in the soil can affect grass seed for up to 3 weeks
Residual Glyphosate in the soil does NOT affect seeding at all,,, at least that is the official word...
Either way,,, IMO when the henbit is dead and dry you can easily overseed then...
Synder says I'm off topic and do not understand the question,,,
so I ask,,,
What is actually meant by the term: Burndown... ?
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage,,, I wonder what does...