On 4/29/2022 8:25 PM, Jane McGary via pbs wrote:

Jane,

In clarification:

There are many Alstroemeria species from Peru, Ecuador, and Chile that
need Zone10 or Zone 9

Chileflora lists several species hardy to Zone 8 or Zone 7.  Most
garden hybrids are hardy to zone 7a.   Ligtu hybrids may take 6b with
minimal protection.

Sunset National Garden Book lists Alstroemeria hybridsas hardy in
sunset zones:

5-9, 14-24, 26,28, 31,and the warmer parts of zones 32 &34.

That would include Virginia , Maryland, Delaware,  Southern New
Jersey, and Southern Pennsylvania. The winter temperature range for
zone 31 is 0-7F and for 32 0-10F. which describes USDA zone 7.  Below
0F would put one in zone 6  i.e. Southerm Michigan.

Hortus III and The RHS Garden Plant Index do not mention Sunset zones
but agree with the 0F threshold.

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