Aroid Forum: What are the criteria for "Zones"?

IAS Aroid Quasi Forum

About Aroid-L
This is a continuously updated archive of the Aroid-L mailing list in a forum format - not an actual Forum. If you want to post, you will still need to register for the Aroid-L mailing list and send your postings by e-mail for moderation in the normal way.

What are the criteria for "Zones"?

From: "Ron Iles" roniles at eircom.net> on 2002.05.21 at 23:44:50(8840)
Please can someone explain what criteria are used for
"Zones"? With a range of rarely freezing to rarely touching 80F,
what "Zone" is West Cork Ireland? This is 20F too low in summer
& 30-40F too low in winter for growing Spaths outside, especially with sea
winds etc.
+More
Ron

Note: this is a very old post, so no reply function is available.