Alstroemeria
Marc Rosenblum via pbs (Fri, 29 Apr 2022 23:24:15 PDT)

Jane,

I estimated that most Alstromerias have a hardiness threshold of about 0
F [-18 C].
Garak's -11C falls well above that threshold. I based my estimate on
Sunset, L.H. Bailey's Hortus III, and the RHS garden Plant Index.

On 4/29/2022 8:53 PM, Garak via pbs wrote:

I can confirm that Ligtu hybrids, psittacinas and modern horticultural
hybrids can tolerate unprotected, snowless frost of -11°C for single
nights. Unlike the Ligtus, modern hybrids will lose overground growth
to late frosts, but usually return soon after. I agree that my mixed
winter climate is far more difficult for them than true continental
climate would be. The psittacina actually has more problems with my
dry summers, it's a really thirsty plant.

Am 30.04.2022 um 05:25 schrieb Jane McGary via pbs:

I don't know where this hardiness estimate came from, but I doubt it
extremely. Any alstro that lives where temperatures go this low would
spend the winter under seasonally permanent snow cover. I don't think
they would tolerate freezing at the depth where the tubers and crowns
lie.

Jane McGary, Portland, Oregon, USA
_______________________________________________
pbs mailing list
pbs@lists.pacificbulbsociety.net
http://lists.pacificbulbsociety.net/cgi-bin/…
Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>

_______________________________________________
pbs mailing list
pbs@lists.pacificbulbsociety.net
http://lists.pacificbulbsociety.net/cgi-bin/…
Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>