wondering if anyone knows the cold hardiness of crownshaft palms. i understand they are the more tender kinds, but why is it that theres fully healthy foxtails while theres dead ones? and literally half-dead Christmas palms? i read somewhere that king palms are hardier than xmas palms... and theres royals growing fine too...Could anyone please make suggestions - based on their experience/knowledge/kindness - on which ones of these palms are known for being able to tolerate freezes. Thanks.