I have been treating my lawn with confront for wild violets. So I don't have many weeds in my lawn, so this month instead of weed & feed I'm looking at a 15-20-10 to boost the phosphorus level in my lawn. Do you think at this time of year this will be a waste or that the lawn will be able to absorb the phosphorus this time of year? I oversowed my lawn pretty heavy last fall. Thought this might help out. What do you guys think?? Thanks in advance.