Since I , so far, only have one, it's not an issue, but my plans are ;
17 (year of the cross)--A (or whatever letter applies, for the "cross")---04 (or whatever Number applies, for the individual seedlings that sprout). So, right now, with only one "potfull", they will be tagged: 16--A--01, (and 02, 03, and 04, when they are 'set out"). The "letter", A, will be logged into a notebook, as "Speckled Sprite X Unknown".