Jane, Thank you for your comments...I want to thank everyone for their comments. I noticed a few years ago a golf course planted some Alstroemeria (don't know the variety) that has returned year after year and is thriving. The last couple winters have not been as cold, for as long, than is usual. But that seems to be the trend.
On Friday, April 29, 2022, 11:12:36 PM EDT, Jane McGary via pbs <pbs@lists.pacificbulbsociety.net> wrote:
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
On 4/29/2022 6:19 PM, Marc Rosenblum via pbs wrote:
> Alstroemerias have a hardiness threshold very close to 0F [-18 C]
> Ligtu hybrids might push this a bit. If you expose them to colder
> temperatures without protection, you risk losing them.
>
>
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