I grew oca again this year (2010), and had obtained some new varieties through the Seed Savers Exchange (from Frank van Kiersbilck in Belgium) which I planted as well. This year was great for oca. I planted it in an area with better quality soil and our frost here came so late (late November - very unusual for this area) that it had plenty of time to form tubers and I got a bumper crop. Good thing I got it out of the soil in time though. When our frost hit, it hit hard. An arctic blast from Canada came in and at the coldest, it was 6ºF (-14.4ºC) here. Those temperatures will turn oca tubers in the ground to slime, so needless to say, I was carefully watching the weather reports.
Here's the area I grew the oca in, to give an idea of what it looks like from a distance and where it was growing. The other plant you'll notice that's vining up the trellis is mashua, which I'll discuss in my next post:
And here's a photo of one of the plants flowering in October. A good closeup view of the clover-shaped leaves.
Here's pictures of tubers of each of the varieties. Definitely some striking and beautiful variety.