Glyphosate can take up to 3 weeks to take full effect. There are a handful of resistant weeds. Palmer amaranth (pigweed) is one. Otherwise it is very effective.

Glyphosate can take up to 3 weeks to take full effect. There are a handful of resistant weeds. Palmer amaranth (pigweed) is one. Otherwise it is very effective. If you don't want to use glyphosate that's totally fine, but just know that residential use is essentially a non-factor in these studies.