Bought some tubers from a catalogue and have started them off in pots in the greenhouse as the instructions suggested until the frost has passed. Had never heard of them before so if anyone has experience of growing these can they offer some tips?
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Thanks for the info. I just looked them up online. They have a US branch that delivers here.Thompson and Morgan. Is a UK company so don't know how easy it would be for you to get some. They looked like tiny sweet potatoes and the book said the leaves are like four leaf clover and you can eat those too. I guess it's a bit of a gamble as the last 3 summers here have been cold and wet but I canm't resist growing something new.
I grew some a couple years ago that I got from a local nursery. I had it in a plastic tote and it grew well. I never got around to harvesting the tubers though, it was a crazy year for me at the time. My local alternative food cooperative has oca sometimes and I've cooked it, it's good, sort of what you'd expect from a tuber and more flavor than a potato. (Sorry I can't be more descriptive, it's been a while since I ate some.)
Oca grows well in damp shady places as well as sunny gardens. It's closely related to sourgrass (aka woodsorrel) that grows wild in forests.
If you're interested in other unique tubers I'd recommend mashua (aka tuberous nasturtium, closely related to your common garden nasturtium), Jerusalem artichokes and yacon (both related to sunflowers). We got some of all of these from Peace Seedlings based in Corvallis, Oregon.