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Re: Cold Tolerant Amporhs

  • Subject: Re: Cold Tolerant Amporhs
  • From: Steve Marak <samarak@gizmoworks.com>
  • Date: Thu, 1 Oct 2009 15:31:26 -0500 (CDT)

T. venosum also grows well outdoors here (NW Arkansas, zone 6) and has for 
many years, at least the normal form. (I've got a couple of big seed heads 
ripening at the moment, so something pollinates it, too.)

I have only one of the "giant" forms, and I haven't tried it outdoors yet. 

Orontium is native over a huge part of the eastern and northeastern US 
(and actually makes it into Arkansas, like Peltandra, though not in my 
area). I've never grown it, but given where it occurs it must surely be 
fairly hardy.


On Thu, 1 Oct 2009, Marek Argent wrote:

Now I plant tubers of T. venosum in pots and during winter I store them in 
a cellar, but earlier I planted them directly into the ground, and it 
often happened that I didn't dig all of them in autumn, then only the 
youngest tubers survived and put leaves next year, but much later than 
these stored in the cellar.

My largest tuber was 11 cm in diameter and the inflorescence grown from it 
was 86 cm (almost 1 fl) tall with the peduncle. The cultivar 'Indian 
Giant' may produce larger tubers, I don't know cos I don't have it.

Besides Arisaema I have in my garden 2 species of Arum, 2 species of 
Pinellia and Calla palustris (in water). This year I bought Orontium, 
maybe it will survive too.

-- Steve Marak
-- samarak@gizmoworks.com
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