Western Montana gardener and botanist in zone 6a according to 2012 zone update.
Gardening on lakebed sediments with 7 inch silty clay loam topsoil, 7 inch clay accumulation layer underneath, have added sand in places.
Visit Redhawk's soil series: https://permies.com/wiki/redhawk-soil
How permies.com works: https://permies.com/wiki/34193/permies-works-links-threads
************************************
Amy Brown
Aspiring permie, autistic, lifelong word nerd
USDA Zone 10b
Argue for your limitations and they are yours forever.
“We can complain because rose bushes have thorns, or rejoice because thorn bushes have roses.” — Abraham Lincoln