Cold-Hardy Palms
Whether a palm can survive a period of cold depends on many things. Indeed, one palm may survive a cold-snap while an adjacent palm of the same species succumbs. With that in mind, this list is only a guide to minimum survivable temperatures and does not represent absolute survivable temperatures.

Some factors affecting cold-hardiness include:
Green Ball Age of the palm
Green Ball Duration of cold
Green Ball Health of the palm
Green Ball Individual genetic make-up
Green Ball Microclimate
Green Ball Palm species
Green Ball Protection (natural or artificial)
Green Ball Relative humidity
Green Ball Soil make-up
Minimum Temperatures for Some Cold Hardy Palms
SpeciesCommon Name°F
Rhapidophyllum hystrix Needle Palm -20
Sabal minor Dwarf Palmetto -5
Trachycarpus fortunei Chusan Palm, Windmill Palm 0
Trachycarpus takil Kumaon Palm 5
Trachycarpus wagnerianus Miniature Chusan Palm 5
Sabal etonia Scrub Palmetto 5
Sabal palmetto Cabbage Palmetto 7
Butia odorataPindo Palm 10
Chamaerops humilis Mediterranean Fan Palm 10
Serenoa repens Saw Palmetto 10
Livistona decipiens Weeping Cabbage Palm 12
Phoenix dactylifera Date Palm 12
Acrocomia totai Gru Gru Palm 12
Sabal causiarum PuertoRican Hat Palm 14
Arenga engleri Taiwan Arenga Palm 15
Brahea armata Blue Hesper Palm 15
Livistona australis Australian Fan Palm 15
Livistona chinensis Chinese Fan Palm 15
Trithrinax acanthocoma Spiny Fibre Palm 15
Trithrinax brasiliensis (none) 15
Trithrinax campestris Campestre Palm 15
Washingtonia filifera California Fan Palm 15
Phoenix canariensis Canary Island Date Palm 16
Acoelorraphe wrightii Paurotis Palm 16
Washingtonia robusta Mexican Fan Palm 16
Syagrus romanzoffiana Queen Palm 17
Copernicia alba Silver Copernicia Palm 18
Jubaea chilensis Chilean Wine Palm 18
Rhapis excelsa Lady Palm 18
Livistona saribus Taraw Palm 18
Phoenix reclinata Phoenix reclinata 18
Trachycarpus martianus Khasia Palm 20
Corypha elata Gebang Palm 22
Hyphaene dichotoma Doum Palm 22
Bismarkia noblis Bismarck Palm 22
Dypsis decaryi Peacock Palm 24

© TJ Walters