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  Arum purpureospathum & dioscoridis hardiness
From: "Marge Talt" mtalt at hort.net> on 2002.10.27 at 19:33:15(9588)
I have Arum purpureospathum and A. dioscoridis, grown from seed,
living in pots.

I would like to plant these guys in the ground rather than keep them

From: James Waddick jwaddick at kc.rr.com> on 2002.10.28 at 10:10:06(9590)
Dear MArge;
No one else has replied so I'll try. I have grown various
forms of dioscoridis here off and on for a while including much
colder winters and have it in the ground now. The trick (as always in
heavy limey clay) is good drainage- raised bed, hillside drainage,
added drianage stuff-sand gravel etc. etc.
Mixed on purpureospathum. I have it in pots in both a cold
frame and cool-frost free greenhouse and it is easy, but have yet to
give it full sway outdoors except perhaps by accident.

In Zone 7 you should have little or no trouble, but watch
drainage always.

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