Central NJ late overseed
It seems like overseeding early is the fashion this year on the forum!
This year I was too busy to overseed on 9/15 like I successfully did last year, so I did it this past Saturday.
I thought it might help the knowledge base of the forum to detail what I'm doing and report back on the results.
I'm located in Central NJ and we're having a mild fall so far. This week the forecast is avg daytime highs in the mid 70s (two days in the 80s) and evening lows in the mid 50s to mid 60s.
I'm seeding a TTTF mix, so it should get up and going in just a week or so. I see many are using KBG this year, so could see why you want the extra weeks for the slower KBG germination.
This year's plan -
My bad spots this year are the spots that were strong last year and resisted my TTTF overseeding. It was mostly fine fescues and poa that recovered from the scalping quickly and outgrew the new TTTF. This summer's heat killed those areas off and left some bare spots.
I used a pretty heavy seeding rate to possibly offset any greater mortality rate among the seedlings due to the late seeding. Seeding was done with a bluebird s22 seeder in a cross-hatch pattern. This year I used a more shallow cut, about 3/8 inch.
I didn't apply starter fertilizer on the day I overseeded this year. This year I'll wait two weeks and then fertilize to help the seedlings come up.
I bought a few bags of Penn mulch, which I used to cover seed over a few bare soil or thin-grass areas. This has a light starter fertilizer in it and helps maintain moisture.
I'm using timers to water for ~15 mins 4x daily. I am still tuning the timings so that I never see the surface of the soil change to a lighter dried-out color.
Other than that, I am just trying to minimize traffic.
Wish me luck!