"Lucky" is not alone. I was weeding by the edge of a bed yesterday, when I noticed some more oca seedlings. Several more. So it seems that oca seeds can overwinter, then germinate and develop quite well here. I find this revelation rather comforting, as it suggests that it might be possible to sow seeds directly outside (I'm thinking by the thousand) and select for early germination and tough, fast growth.
I have to admit that all these seedlings look healthier than my own ones did at a similar age. I'm guessing that they won't make anywhere near as much growth as their cosseted counterparts before winter, however. Maybe that doesn't matter. It may still be possible to select outstanding individuals from the mob. Alternatively, it might be possible to use some sort of cloche system to warm the soil and get them started earlier, then remove it before they get spindly (as all my indoor seedlings did). I could try it next year.
These country cousins seem to have cobby conformation and a sanguine outlook on life. I kind of like the idea of a self-sowing Inca root crop that inveigles its way into your existing crops. Presumably new oca varieties appear this way in their Andean highland home. You've heard of TPS (True Potato Seed - if not - look here). May I introduce the latest in oca acclimatization technology - TOS - True Oca Seed. Once I've figured out how to get large crops of seeds on a regular basis, I'll be looking for a bunch of fellow TOSsers to help grow and select them. RSVP.