Anyone use this on horse pasture? I only have @ 2 acres - and can’t remove the horses to fertilize - was thinking of trying this as it says it is safe to turn horses out when dry…
I have not heard of this company before, but a quick google search brings them up.
Which formula/product are you looking at?
The couple on their front page really aren’t going to do you much good on a grass crop (which is what a pasture really is!). Grasses need far more Phosphorus, Potassium, and Sulfur than what these products offer.
Have you done soil sample, to see what you actually need?
Ag quality MAP or DAP (Phosphorus), Potash (dry potassium) and AMS or Gypsum (sulfur sources) are all safe to spread with livestock on them. Ideally, you would have the fertilizer “rained in” before turning the horses back out, but if the grass is short and the granules get to the soil, and aren’t hung up in the grass, the horses are not likely to eat much of it. And even if they did, we are talking about mostly salt compounds and minerals they eat anyway.
I would not get hung up on the Aggrand’s “organic” or “natural” fertilizer marketing. Fertilizers are fairly benign (I’ve spent plenty of time standing knee deep in all the products listed above, shoveling it off rail cars), if applied at appropriate amounts, and not excessively leached or washed into a nearby creek.
In my area, a typical pasture blend would be around 150# of MAP, 100# of Potash, and 75# of AMS per season, sometimes split into 2 applications (which would maybe be a good idea, if you are not removing the horses when you spread). This mix would be about a 30-78-60-18S mix, as opposed to a 4-3-3 or 0-12-0 like I see on the Aggrand website. These fertilizers are better suited to garden applications, where it can be placed in close proximity to individual plants, rather than broadcast over 2 acres.
Let me know if you have more questions! 
