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Oxalis tuberosa is a multi-colour sour-starchy Andean tuber that is frost intolerant and does not begin to form tubers until days shorten, around the fall equinox. It does not like overly cold or overly hot temperatures. However, I'm a sucker for punishment so I've been working with other growers to see if we can produce a variety that crops early enough to make it more widely adaptable.
This year I was involved in three Oca growing projects. One of which had an outcome worth reporting.
Okay all data is good data even if the result sucks. My own seed grown (seed sourced from Cultivariable) Oca and my row of heritage Oca mostly were eaten by something or suffered such stunted growth secondary to drought that the results fell under the amusing threshold.
I also participated in a controlled light experiment at the seedling stage that didn't yield anything superior. These were meant for disposal but were planted in a greenhouse very late in the hot, dry season, sulked and gave me micro tubers that I can use to increase the genetic diversity of my stock if nothing else.
Overall, the fall temperatures were on the mild side but there were several night lows around -3C to -5C. Gives me hope for a low work strategies to covering around these parts. A Quebec grower has had a lot of luck pre-starting tubers and then growing out with adequate water in not quite full sun with early tuberizing varieties producing adequate yields by mid-October.
We had two plants that seemed promising from the college trial. All plants formed few deep tubers and many more crown, even stem tubers. This seems to mean that overall tuber size will be smaller. May have been as a consequence of their watering system and the drought.
All about growing, selecting and using edible plants in the Ottawa valley.