Alstroemeria
Jane McGary via pbs (Fri, 29 Apr 2022 20:25:17 PDT)
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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