Zantedeschia
J.E. Shields (Fri, 22 Oct 2010 05:17:16 PDT)

Besides Z. elliottiana, there are two more species of yellow
Zantedeschia: Z. pentlandii (in the trade, OK in containers) and Z.
jucunda (spell?) (hard to grow even in containers).

I would guess that Z. albomaculata and Z. rehmannii are the hardiest in
cold climates. Z. 'Black Pearl' does very well outdoors in the ground on
the east (protected) side of a greenhouse. It blooms every summer and
increases. I don't know what it would do out in the open field.

Z. aethiopica cvs. have not survived out in the open in the ground here in
central Indiana, with the exception of Z. 'Green Goddess' which barely
survives planted hard up against the foundation on the south side of a
greenhouse.

There are plenty of hybrids in all colors as well.

Jim Shields
in Westfield, Indiana
USA

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Jim Shields USDA Zone 5
P.O. Box 92 WWW: http://www.shieldsgardens.com/
Westfield, Indiana 46074, USA
Tel. ++1-317-867-3344