Hello Helpers, I live in Central Ohio, and have been a homeowner for 15 years. I even have irrigation system for the lawn, and water bills run around $200/month of my 8,000 sqft lawn size during the 2 hot summer months.
Anyway, last 2 years my Kentucky Blue grass lawn seems getting into worse shape. Every springs, I notice some patches of "light brown" grass which I think had died over the winter, and my grass are getting thin! So that means Bittercress have flourished last 2 years. Following is what I did for my lawn care last 10 years. Please tell me what am I missing. The first 4 points below are consistent.
1) Every spring early-to-mid April, I put down fertilizer with Crab grass prevention. This is done mostly using Scott products.
2) Around mid-to-end of May, I will put down Scott Step 2 fertilizer with broad leaf weed herbicide.
3) Every year, I probably use spray-herbicide 2 to 3 times to spread on targeted area with weeds. Mostly broadleaf.
4) The summer season, I would may skip fertilization. If I do fertilization, I typically using Scott Turf Builder All Season or other generic brand fertilizer.
Between Summer and Autumn, I will do at least once fertilization.
5) In autumn, I may skip fertilization. Some times I may use Scott Turf Builder All Season, or use generic brand winter fertilizer or Scott Winterguard.
6) Every 2 years or so during last 4 years, I would put down $60 worth of blue grass seeds during Sept with sprinkle turn on every day for a short period to help with the seeding.
Please see the attached pictures. Some part of my lawn are thick, some are thinning out. I know central Ohio is notorious for clay soil, and I think my builder was giving only thin layer of Top soil when house was built.
A) What do you think that I am missing here? I am thinking going nuclear with putting down say $200 worth of bluegrass seeds, and then put on an inch layer of top soil during Sept. Heard this really help with seeds germination and giving a better soil base.
B) I recently read that I should put down either Crab Grass preventer or Broad leaf weed (Scott Step 2) during the late autumn to kill those Bittercress or over-winter-weeds. Any recommendation?