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Plant hardiness and cold tolerance Index spreadsheet

Followers

August 10, 20169 yr

Attached is a hardiness and cold tolerance index I have been working on, its not complete, let me know what you think?

I have posted this here and not the freeze damage forum to to see if people think it would be worth working on this communal freeze damage and palm hardiness data base, i have used the trebrown website as a base for the list. This kind of database may already exist but is so I am not aware of it?

Plant hardiness is not all about minimum temperatures, obviously some plants can tolerate wet frosts where others will only tolerate dry frosts and minimum temps do not take into account the duration cold temperatures of the daytime highs. Extra columns added to describe these individual attributes. Alot of this information can be guesses by looking at the provenience of the plant.

Palm Hardiness Index and Cold Tolerance Index.xlsx

Max High. (°C)	39					Av Days >= 30 degC	5
Min Low. (°C)	-5					Av Days <= 0 degC	26

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August 10, 20169 yr

There are other hardiness lists posted in the past on this forum that you can find and compare the data. Off the bat, I see some palms in your list as zone 8a that probably should be 9a and 9b. Some palms don't have any recorded data.

Tyler

Coastal Zone 9a

''Karma is a good girl, she just treats you exactly how you treat her"

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August 10, 20169 yr

Good Job.. That looks like it took some time to do! All very useful in my opinion. Leaf hardiness is another issue especially in colder climates. Butia in my experience is the winner there.