What does granted beaded neck mean?

Answer 1

I heard it was "granny-beaded neck". Here is Randy Houser explaining:

Well my grandma would always come work [in the gardens] ... Granny beads are what they're called when a grandma works the garden all day -- you always see them -- they have a handkerchief around their neck with a lot of dust on them, and then the sweat will go down and make these black beads of sweat and dirt around their neck. And that's what they call granny beads."

Answer 2

The line of the Randy Houser song is actually 'granny beaded neck' not 'granted beaded neck'. The following was found on www.the boot. Randy writes "When I was a kid, we always had big gardens, acres of stuff we grew out in the yard," Randy explains to The Boot of the inspiration behind his 'Boots On' lyrics. "Well my grandma would always come work [in the gardens] ... Granny beads are what they're called when a grandma works the garden all day -- you always see them -- they have a handkerchief around their neck with a lot of dust on them, and then the sweat will go down and make these black beads of sweat and dirt around their neck. And that's what they call granny beads.