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[quote=Anonymous]DP. Just did spot overseed with pre-germinated turf type tall fescue (TTTF) today to give the seed a fighting chance before hitting the ground. Daily soil temps get to the low 60s during the day in the sun so still a chance at least in NoVA area. Check precip.ai website and enter zipcode for daily/near real time soil temps (or get a temp probe, I suppose). i like it better than the Yard Mastery app (or maybe it's wishful thinking on my part since it was showing warmer soil temps). Saw a southern MD Lawn Lab youtuber show how he did seed in late Oct thru Nov last year - it worked but just took longer. I figured it was close enough to our NoVA conditions.

This is round 3 overseed in October in Northern VA area:  1st was Oct 7 (testing pregerminated seed in a flooded/oversaturated area that needed some reno part 1; 2nd was Oct 18 on sunny portion of yard as near lawn reno after nuking weeds; 3rd was today in the oversaturated area on the bare dirt backfill after removing a temp french drain/trench.

1) 10/7 seed - did great! Did 2nd mow today (first mow probably didn't cut much but existing grass was getting high and I knew I needed to put in more dirt and reseed some of that area anyway due to adjacent drainage issue
2) 10/18 seed - starting to sprout now - delay due to getting pregerminated seed down late and dried out and then the cold temps hit - new popups just today in the afternoon sun
3) 10/26 seed (10-13sqft area) - seeds were more primed and about to germinate probably in the next 12hrs - we will see how they do in the lower temps and the oversaturated area is still, well, oversaturated so some areas may just be too wet and under water at certain pooling spots

Of note, the areas that had leafgro thrown down as light layer on top sprouted first compared to bare clay/soil with seed on top. The leaf compost does wash away some even with the basic water but sprouts occurred there first consistently accept those that maybe had too heavy of a hand of leafgro thrown down. I didn't use formal 'starter' fertilizer per se but I did mix the pregerminated seed with milorganite so effectively my it was my starter fertilizer with the seed. This round 3 I was out of milorganize for just the few oz of grass seed so I mixed with sand and some topsoil. Mixing the pre-germ seed with milorganite was much easier to even distribute if you are spot seeding by hand. You can see the seed and density better than when it is mixed in sand and I ended up putting down a lot more seed when it was mixed in the sand and harder to see and adjust as quickly.[/quote]

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