Answer: These plants produce tuberous roots. As soon as the first frost nips the foliage (do not let them get colder than a frost, they should not undergo a hard freeze), gently trim off the leaves. Gently dig it up (avoid cutting or bruising the roots) and rinse clean. Save the largest and plumpest. Pack while damp in clean shavings or vermiculite or similar material. If in a container, after frost trim them back and store them in their pot with just barely damp soil. Store between 35 to 45 (some sources suggest a maximum of 41) degrees. Keeping them this cool assures they will not dry out too much during storage. Check regularly and discard any that shrivel (check storage temperature, it may be too warm)or rot (too cold or too wet). Good luck!
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