Oca: Cucumber Mosaic Virus

Leaf of an oca plant infected with Cauliflower Mosaic Virus

I recently spotted virus symptoms of a sort that I haven’t seen before on an oca plant.  Although oca is frequently infected with several different viruses, they are typically asymptomatic.  This plant had some lower leaves with obvious yellowing and mosaic and some leaf tip browning.  I ran it through a few ELISA tests for […]

Oca: Early Sprouting Syndrome

Oca (Oxalis tuberosa) tubers with early sprouting

One of the best things about growing oca is that it is generally very resistant to disease.  Unlike potatoes, which are vulnerable to more than a dozen common diseases and need constant attention, oca usually fends for itself very well.  The most common problem here is a bacterial stem rot, but it usually occurs late […]

New Variety Introductions for 2016

I’ve announced a lot of achievements that I was proud of in this blog, but this might be my favorite. These are the new varieties that we have produced in the past couple of years, all of which have been released under the terms of the Open Source Seed Initiative pledge. That picture represents thousands […]

Oca: Is potato cyst nematode a concern?

I’ve had a few inquiries lately about potato cyst nematode infestation of oca (Oxalis tuberosa) and any time I see a question more than once, I start thinking about a blog post.  I should emphasize from the beginning that I have no direct experience with this subject.  As far as I know, there aren’t any […]

Oca: Crunching the numbers on 2 years of oca from seed

Last week, I answered the most frequently asked question that I receive about oca.  This week, I am taking on the second most common question: What are the odds that I will get a variety worth keeping from oca seed? Oca, as an octaploid, is a fundamentally heterozygous plant.  Every oca seed produces a different […]

Know Your Andean Root Vegetables: Part 1

We have been very lucky to find an artist who can translate my crude scribbling into a beautiful finished product.  Here is a handy introduction to the major Andean root crops: Mashua, Oca, Potato, Ulluco, and Yacon.  There is also a two page flier with the same information attached below.     Click here for […]