Does anyone grows yacon in zone 5? If yes, do you keep bulbs in a root cellar until last frost, or rather plant them in pots late winter, and then move to the garden after last frost? Obtaining yacon roots was a challenge here in Poland but finally I have a few, and I want to make best use of them. Last frost date here is 15th May, please advise how to handle yacon from now to this date.
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