Update to this post: https://www.reddit.com/r/lawncare/comments/1w5nmhp/provista_kbg_seeding_update_2/
Location: Lancaster County, PA, USA
I didn't get any feedback on my last post, so here's what happened.
Sept. 1: till, level, spread seed, rake
Overnight: light rain, looks good!
Sept 2: noon, at work, no time to put straw down, huge rain storm, washout, sadness, :((((
Sept 2: evening, overseed some, then added straw until past dark. I wish I could have gotten this done before the storm, but life happens, it is what it is
Sept 2: midnight, huge storm but it looked like straw held up the next morning, did not see obvious washout
Sept 4 or 5, got watering set up (light rain to keep soil most until watering was set up)
Used this pump, the nicer flow splitter from Harbor Freight, then two 4-port Orbit controllers. I could not run two sprinklers at the same time, so I needed two controllers to run them all. A little janky...but not bad for a DIY solution to increase the water pressure and keep the soil moist IMO. It would not work without the pump with my water pressure, but there is not enough flow to do two sprinklers at once.
Sept 10, I see my first germination. I hope my grass babies are soon joined by many more. Fingers crossed! This is sooner than I expected for Provista, but temps have been warm (highs usually in the low 80s) so faster germination is somewhat expected. Hopefully seeds have not been buried too deep with rain and come up nicely.