As long as you're not leaving it on the same spot for days at a time, the grass should be fine - a little matted maybe, but fine. Any change of color should bounce back pretty quickly.

Spotty higher pH can happen if you got the soil off of one particular section of the pile...that happened to contain the old B horizon with some limestone in it! In my case, I got the old subsoil on my lot, so it just kind of stank all around. * You said you targeted our phosphorus level higher than your own lawn. Is this due to the pH difference or something else? Is phosphorus bound in the soil at higher pH's, and is our pH (7.1 - 7.3) high enough to cause that? pH. If you look at the availability of P by pH, it drops as pH rises above seven. You're not that far over, the binding isn't extreme, so I just boosted the numbers a little bit. Your standard is around 220, most people with slightly acidic pH would be around 200. In your case, I wouldn't blink at anything between 200 and 300. I never use my own soil as a standard, per se, for anybody else's. Mine have given in to some experimental stuff, plus I've over-enhanced the gardens to match the (extreme) density and (extraordinarily high) performance I demand they support. My current P levels in the garden push 1,000. * What kind of quality issues can we expect from the low phosphorus level until it's corrected? Thin, weak, sparse growth that gets sick and dies easily, discolors easily, grows poorly, and generally doesn't look at all good. Installed sod would tend to thin out and die back over the course of a year or so if it isn't corrected, resulting in a lot of thin patches and blank areas. N, P, and K are the big three and absolutely have to be there in the correct proportions (N we take care of on an as-needed basis). * It sounds like the Milorganite is great stuff, but I'm very sensitive to odors, so I don't think it's a good fit for our lawn. If we used ferrous sulfate instead (being careful to sweep it off the concrete), what rate and frequency would you recommend? I assume we don't need to worry about lowering the soil pH too much with the ferrous sulfate since the starting pH is above 7.0. I'd be comfortable with ferrous sulfate (monohydrate or pentahydrate, it doesn't matter) at 3 pounds per thousand square feet in April, early October, and perhaps early November if the weather's holding. Keep an eye on the pH in this case, though, as iron sulfate is about an eighth as acidifying as pure elemental sulfur and does NOT require digging in to work! Never use iron during hotter months or when the soil's going to freeze solid for winter within two or three weeks of use.

Wow! Ingenious way to sell paramagnetic basalt rocks. The pH is not the problem with animal urine. The problem is too high a concentration of the nutrients in urine. When the population of microbes is sufficient, you won't get the burn. It could be that coming out of winter your microbes have simply not awoken yet. The sugar seems to cause them to awaken. It could be bacterial activity warms the soil enough to wake the rest of them up.

This is an old post, so you may have your answer or may no longer be on here, but... Around here, Hakonechloa grass has been eaten by our horses or dogs before they were even planted, but Luzula has never been touhed.