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Old July 17, 2016   #9
ilex
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Join Date: Jul 2011
Location: Spain
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These onions are really the result of a cross between two species and then reproduced vegetativelly for generations. Diversity must be very big, so one or two rounds of selfing won't be a problem. You can also let them cross with other varieties.

The main problem with these and garlic is that they accumulate virus. Just by growing from seed should show a big increase in vigour.

Once a plant is not propagated by seed for many generations it tends to loose its ability to make seeds. Potato onions or garlic are perfect examples.
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