Hi Pam
(asking about her weedy lawn- not cared for in 5 years)
Hopefully you recognize that these days the weed treatment is not as good as it used to before the Ban.
the Weed product used Iron to knock back the weeds. The tops of some weeds will turn black very soon, Some tops will die off, some will only be affected around the edges, some will resist the treatment.
Since the roots are not always affected, the plant will regrow from the roots. Several applications will be needed.
It is therefore also important to (while the weeds are down) to nourish the grass by feeding it to become thicker and more dense.
Fixing the lawn is not an quick fix these days. It will take time. It is a process that you have to be willing to invest in over a couple of years at least.
We would normally recommend at least 3 high quality fertilizations per year.
Having said that though, there is new fertilizer technology that will allow us to apply an All year fertilizer that releases slowly over the whole year. One application will give the equivalent of the 3-4 fertilizers. The product is more expensive, and is applied heavier, but you save on the labour costs.
Crabgrass- usually grows in sunny spots where the grass is weaker. Fall is a good time to thicken up any weak areas by seeding the lawn.
Gerry
