SPECIES ZONE SCALE FOR SUBTROPICAL CLIMATES
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Palmpedia is going to try a new way to rank and catagorize the cold hardiness of palms. Instead of trying to define the nebulous concept of low temperature limits and climatic zones, this will be a comparative rating of species. For example, if you see King palms growing in your neighborhood, then everything rated hardier on the SZS (Species Zone Scale), would be hardy for your area. Each zone will have a common palm as the "namesake" for the zone indicating the least hardy palm in that category. Therefore, if you see Queen Palms across the street, anything in the Queen Zone (SZS #2A) and below will be hardy enough to survive for you.
This will always be a fluid document, so jump in and add your 2 cents of wisdom.
- 1 SPECIES ZONE SCALE #1 - HARDY PALMS
- 2 SPECIES ZONE SCALE #2 - SEMI-HARDY PALMS
- 3 SPECIES ZONE SCALE #3 - TEMPERATE PALMS
- 4 SPECIES ZONE SCALE #4 - SUB-TROPICAL PALMS
- 5 SPECIES ZONE SCALE #5 - TROPICAL PALMS
SPECIES ZONE SCALE #1 - HARDY PALMS
- Sabal minor - Phoenix canariensis
- Phoenix canariensis - Washingtonia robusta
SPECIES ZONE SCALE #2 - SEMI-HARDY PALMS
- Washingtonia robusta - Syagrus romanzoffiana
- Syagrus romanzoffiana - Phoenix roebelinii
SPECIES ZONE SCALE #3 - TEMPERATE PALMS
Phoenix roebellini - Archontophoenix cunninghamia
SPECIES ZONE SCALE #4 - SUB-TROPICAL PALMS
Howea forsteriana - Wodyetia bifurcata
Wodyetia bifurcata - Adonidia merrillii
SPECIES ZONE SCALE #5 - TROPICAL PALMS
Adonidia merrillii - Cocos nucifera
Cocos nucifera - Cyrtostachys renda