I suspect what you need is opposite of us in the frozen north needing to set up overwintering locations that are warm enough as in 40's or above. I think you need to figure out a way to set up overwintering location that can be 40's or below but above freezing.
My seed grown alpines grew fine outside in the summer with average night time temp of around 70Â°F and day time high ranging from 80's to 90's. But I am finding that the over wintered plants in the garage in "V8 nursery" where I've tried to maintain 40's with occasional dip in the 30's and occasional hump into low 50's have flourished the best.
The ones in "Siberia" area of the garage where it got down to mid-20's or below are dormant and the ones that I kept indoor in upper 50's to 60's are not doing as well. We will see if the ones that were left in the ground outside survived this winter's dip down to the typical negative single digits for this area.
They seem to need good lighting too -- equivalent of at least "1/2 day sun" or good enough for tomatoes -- to be vigorous enough to fruit well.
...what do you think... A wine fridge set up with lights... A humidor.....?
Subject: Growing Alpine Strawberries from Seeds
As I mentioned earlier, I overwintered some of the White Soul Alpines that were started from seeds last year.
Here's an update -- Different conditions. One still producing a few every week. Ones in the collage top left photo were picked a couple of days ago.
Top-right and Middle-left are in Garage V8 Nursery area.
Middle-right is in the house (Green Room by the window but far from supplemental lights)
Bottom-left was probably overwatered, and Bottom right got dried out plus it's in â€œSiberiaâ€ â€“ uninsulated side of the garage near the garage door with overwintering Sweet Pepper SIPs (temp occasionally drops to near mid-20's).