How Low Can They Go? Challenging the frontiers

[Mike T]

http://rfcarchives.org.au/Next/CaringForTrees/MinTemps3-88.htm
Don't believe everything you see published with what various species can tolerate. here are lots of varieties within species and very often there are different cold tolerance. Accepted norms such as in the 1988 list in the attachment and in many other places need updating. I am sure many forum members can see what is generally accepted is quite conservative.
I assure you breadfruit can go much lower than 8c and chempedak may be a bit less cold tolerant than jackfruit. I am sure the imperialists can convert to Fahrenheit in their heads.

[Ulfr]

Acerola is another one that can go way lower (at least -2C here unscathed)

[Mike T]

Old and published information should be challenged and that is a great example from experience. With many of these species an absolute number doesn't say much. Some durian varieties struggle below 8c and some are fine at 4c.

[Frog Valley Farm]

How do you convert c to f.  Did the indigenous people of Australia always use C?🐸

There are so many different micro climates that the 1 size fits all, package it, market it,  sell it, really doesn’t work at all for growing plants.  California 10a is not Florida 10a.  Farm to farm differences are huge even in same state or town.

[Chandramohan]

C X 9/5 plus 32 = F.

[pineislander]

this is a useful free app converts anything

https://joshmadison.com/convert-for-windows/

[Mike T]

A a rough guide 32f is 0c and 40f is about 4.5c. I am sure an enterprising forum member will at some time put a guide together of species and their varieties tolerances as the same questions keep being asked.

[Jaboticaba45]

Time also plays a factor... hour vs day vs week. Even though grumichama is cold hardy to 26F, you wouldn't see trees here because there are prolonged times of cold weather.

[Mike T]

The questions on this opic get asked really often. There are a few variables all right but I don't think its a total exercise in futility.

[Francis_Eric]

For C to F
I always Just did the math Like this

23 + 23 = 46

46
28+
=74

(actually it's 73.4 but close enough)

isn't it different as the numbers go (edit) down  though like plus 32 or something? (5c +5 =10 =41 F so plus 32 or close enough)
maybe someone can clarify better.
I just try to get in the ballpark of how Hot a place might be or cold.

[Mike T]

http://rfcarchives.org.au/Next/CaringForTrees/HowSouth11-82.htm

The Australian experience from around 40 years ago was to put out lists of what you can grown in each location and mark the limits of distribution of each tropical fruit species. By todays standards it is pretty conservative and once again breadfruit is 100's of miles incorrect.