It's been two weeks and we have been into the high 70's and low 80's several days, so hopefully most of the damage is evident now. To recap we hit a low of 12F at my house and were below 15F for at least 9 hours. This was the type of freeze we see maybe once a decade. We get that cold about 1/2 our winters, but not for the duration we saw this time. Normally, we might be below 15F for an hour after a warm afternoon with a quick recovery to much higher temperatures. Most of these palms survived a very brief 14F with no damage 2 years ago. I will break these up into 3 groups:
First, the undamaged:
Brahea armata;
Brahea decumbens (largest one);
Brahea moorei (covered with a box);
Butia capitata;
Butia capitata (silver form);
Butia archeri
Butia eriospatha;
Butia paraguayensis;
Butia species (no scientific name yet, clumping Butia with subterranean trunks);
Butia capitata x Jubaea;
Butia capitata x Parajubaea coccoides (fronds bronzed by snow previously, but no additional damage from cold covered only with a box);
Chamaedorea microspadix (under a bucket);
Chamaedorea radicalis (under a bucket);
Chamaerops humilis;
Chamaerops humilis var Cerifera;
Jubaea chilensis;
Nannorhops ritchiana (smallest one);
Sabal causiarum (36" box on my driveway);
Sabal guatamalensis;
Sabal mexicana;
Sabal minor;
Sabal palmetto;
Sabal riverside;
Sabal rosei;
Sabal texensis;
Sabal uresana;
Trachycarpus fortunei;
Trachycarpus nanus;
Trachycarpus takil;
Trachycarpus wagnerianus;
Trithrinax acanthicoma;
Trithrinax campestris;
Washingtonia filifera;
Second, spear pulls, but older fronds undamaged (these are mostly small palms 5 gallon or smaller, and most were covered by a bucket or box):
Brahea decumbens (small ones, unprotected);
Butia yatay;
Butia paraguayensis x Syagrus;
Butia yatay x Syagrus;
Jubutiagrus;
Phoenix theophrastii;
Rhapidophyllum hystrix (unprotected);
Serenoa repens (blue, green and silver)( not established yet, and unprotected);
Trachycarpus princeps;
Third, the completely or mostly fried (I'm confident most of these will recover):
Allagoptera arenaria (older fronds damaged previously by snow now dead, new fronds fine, covered with frost cloth);
Brahea aculeata (covered by a box);
Brahea clara (not established yet, some still in 30 gallon containers, older fronds bronzed, newer ones fine);
Brahea edulis (older fronds fried, newer ones still green);
Butia capitata x Syagrus (not established yet with no old fronds, tender new growth burnt);
Livistona chinensis (under a bucket);
Livistona decipiens (under a box);
Livistona mariae (under a bucket);
Nannorhops ritchiana (2 largest ones);
Phoenix canariensis;
Phoenix dactylifera;
Phoenix loureirii (older fronds burnt by snow and 20F, remaining fronds damaged by 12F);
Phoenix sylvestris (45 gallon containers on my driveway);
Sabal bermudana;
Sabal yapa (burnt by snow and 20F);
Syagrus romanzoffiana (burnt by snow and 20F);
Trachycarpus latisectus (5 gallon size);
Trachycarpus "Naga Hills" (5 gallon size);
Washingtonia filibusta;
Washingtonia robusta.
I will be updating the freeze damage data section with this info, but thought it would be nice to see it all in one spot. Anything that surprises anybody either way on the list above?