Glyphosate is deactivated on contact with soil. It only works by absorption through the green part of plants. Grass seed could be applied straight after the application of the weedkiller but realistically it is better to wait until the weeds are dead as it may be necessary to retreat some of the more persistent weeds and it is much better to wait and clear the weeds fully than have to try and deal with them as the new grass is growing.
Categories:
Glyphosate,
Lawn
