Re: colocasia non-tubers (repost of original)
In response to Lester Kallus's post, I can share similar experiences.
I, too, have never observed a corm development when digging up or
transplanting C. antiquorum illustris, C. fontanesii or the "whatever
you call it" solid black taro. On the other hand, the latter two have
been reliably ground hardy for me (zone 7b), while C. antiquorum
survived in the ground, but with a diminished success rate. The one
time I tried to overwinter these in pots in a cool basement it did not
work as well as just leaving them in the ground. Also, storing bare
a failure for me.
Is it possible these plants develop corms under more favorable
conditions or with age? Is there such a thing as a "fleshy" corm? For
example, some Xanthosomas seem to have a turgid mass of tissue at the
base, but not always with a hard "corm". Similarly, I've overwintered
(bare root) an Ensete ventrosicum maurellii (Abyssinian Black Banana)
for several years now, and there's never been the typical, almost
"woody" banana corm--just a thick mass of fleshy, almost spongy
"plant-base". Nonetheless, it comes back year after year even after
months of dormancy.
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