Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
I went the boring, industrial route, purchased DyKem markers, under $3.50 at Grainger.
DyKem makes paint, ink, dye markers which hold up under adverse conditions.
There's one that marks invisibly - and glows under black light....ooooooo....
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"