Barna:

Winter hardiness of plants can vary by as much as 20 degrees F, based on the amount of summer heat they receive or don't receive. In other words, if a warm climate plant would survive -10 degrees F in a hot summer climate, it will likely not survive lower than +10 degree F in a cool summer climate...hence the reason for the discrepancies in hardiness ratings.

Tony Avent
Plant Delights Nursery @
Juniper Level Botanic Garden
9241 Sauls Road
Raleigh, North Carolina 27603 USA
Minimum Winter Temps 0-5 F
Maximum Summer Temps 95-105F
USDA Hardiness Zone 7b
email tony@plantdelights.com
website http://www.plantdelights.com/
phone 919 772-4794
fax 919 772-4752
"I consider every plant hardy until I have killed it myself...at least three times" - Avent

-----Original Message-----
From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of Barna Sipos
Sent: Friday, November 30, 2012 5:11 PM
To: Pacific Bulb Society
Subject: [pbs] Lycoris Cold Hardiness

Hi All,

I tried to find some more exact information about the cold hardiness
of some Lycoris species, but every webpage says something different.
(somewhere the L sprengeri hardy to USDA zone 6 but the other page is warning:
"do need to be brought indoors for the winter" in the UK.)
Has anybody got information about these plants? Which one is reliably frost hardy at which USDA zone?
I would be interested mainly the species listed below.

L albiflora
L aurea
L caldwellii
L chinensis
L haywardii
L houdysellii
L longituba
L radiata
L rosaea
L sanguinea
L sprengeri
L traubii

Many Thanks,

Barna Sipos
Hungary, UK
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