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Alocasia & Colocasia

chris.oz

By chris.oz
in TROPICAL LOOKING PLANTS - Other Than Palms

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chris.oz Mentor

chris.oz

Posted
Posted

Even though our air temperatures drop to no less than +2C each winter, the only one of these 2 genera that survive with leaves intact over winter is A. macrorhiza.... or one of its forms.   I am trying an experiment with a Colocasia in our pond,   since the water does not drop below 10C,  maybe the  plants will like it better actually in water rather than in the ground.  

What is the most cold hardy Colocasia ?

chris.oz

Bayside Melbourne 38 deg S. Winter Minimum 0 C over past 6 years

Yippee, the drought is over.

palmmermaid Veteran

palmmermaid

Posted
Posted

I am not sure which one is the most cold hardy.  I had the same problem and asked a person who only grows aroids.  She told me they "downsize" in the cooler months and then come back in the warm weather.  I have found some species to downsize more than others, in particular the dark leaf varieties.  The 'Borneo Giant' does somewhat.  I think it is a C. macrorhyza.  My mother grows the old fashioned elephant ears in Jacksonville, FL where hard freezes occur every winter.  It dies back and comes back just as big in the spring.

Palmmermaid

Kitty Philips

West Palm Beach, FL

Carlo Morici Veteran

Carlo Morici

Posted
Posted

I think Alocasia cucullata was often mentioned as the hardiest.

Paul S Collaborator

Paul S

Posted
Posted

There is a colocasia doing the rounds in England that arrived as c. fallax, but isn't.  It has proved to be hardy to -8C - coming back from runners that it sends all over the place in the course of the growing season.  It has a small tuber, compared to some of the large 'Taro'-type tubers and leaves can get to 70cm long.  They have an attarctyive purplish tinge near the centre of the leaf.  Unfortunately, no name has ever been successfully ascribed to it so it is difficult to find.

Colocasia fallax itself is quite hardy, but not really that impressive - well, if size is your thing, anyway.  Smallish leaves, maybe 30cm long with a silvery marking around the middle.  Nice in it's own way.

'The Essex Riviera'

Southeast England, UK

winter min usually -5C

Summer max usually 35C

Rainfall usually 20" (500mm)

Carlo Morici Veteran

Carlo Morici

Posted
Posted

(Paul S @ May 19 2007,10:26)

QUOTE
...runners that it sends all over the place ... a small tuber... attarctive purplish tinge near the centre of the leaf. ....

I think I know what you are talking about  :)  It is the weedy one that comes out of the draining holes of any pot ! Hard to kill

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