I wouldn't bother spraying the humic dg. It's made to be spread. I mean you can spray it, just seems like wasted effort.

 

I have humic powder that I sprayed last summer and fall.....but I still ordered a bag of Anderson's humic dg granular.
IMO, spreading is waaayyy easier, less messy, and faster. I also over did the concentration when I sprayed last fall and some juvenile grass turned neon green and sent me on a poa tizzy.

I'd find something else to spray. I put a teejet nozzle & cf valve on my backpack sprayer and plan to time myself & flow rate in the driveway with water before using products.

 

What setting did you use on your spreader? I can't find any information that correlates settings on the TurfBuilder to the settings on the R-8 or R8A

 

What setting did you use on your spreader?

From https://andersonshumates.com/applications/#HDG...

For Humic DG applications, we recommend the following application rates:

* Field Crops (in furrow): 10 lbs / acre
* Field Crops (broadcast): 40 - 200 lbs / acre
* Fruit, Vegetables and Specialty Crops (broadcast): 40 - 200 lbs / acre
* Fruit, Vegetables and Specialty Crops (row acre): 10 - 40 lbs / acre
* Established Turf: 40 - 200 lbs / acre
* Newly Seeded Turf: 20 - 80 lbs / acre
* Hydro Seeding: 20 - 80 lbs / acre
* Landscape Plants: 40 - 80 lbs / acre
* Bulk Soil Mix and Back Fill: 2.0 - 10.0 lbs / cu yd