Re: Elephant ears
I just use mulch. If you pile it up deep enough it won't freeze at the bottom of the pile and if it is really deep you'd be surprised how dry it can be at the bottom of the pile. If you pile up a little pyramid it will mat down and form a bit of a brick that really keeps the moisture low. A middle layer of plastic might help too as long as it is not too close to the corm where it would trap moisture in. In spring I spread the mulch around and it keeps the weeds down.
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