I've dugg a couple dozen roots, all on the same patch on hillside, and some of them are drying different colors than the others. Almost a dark purple-grey. Most of the one's that are drying that color are my thicker roots. Is it the soil? or something different affecting this?
sorry dont mean to question your sang, I have just seen some interesting things over the years. Soil does do some funny things, I have a couple of valleys I dig in that have alot of clay and the roots dry a rusty red color, might be the soil
it also may be mold or early stages of rot. sometimes too much moisture during the drying or in the soil during the latter part of the season causes this. i would check the taughtness of the root to be sure this isnt the case. otherwise, im not of much help. i have never seen any discoloration other than the shade of red/brown due to soil variation.