Chamaerops ‘cerifera’ has very underrated hardiness.  Few species are more leaf/bud hardy here in north Louisiana—Needle palm, Sabal minor variants, and maybe Trachycarpus (which struggles due to heat here).  Four or five winters of 7B really only resulted in minor leaf burn and no loss of trunks.  The green cultivar by comparison was total defoliation and loss of 20-100% of trunks.  Cerifera is leaf hardier than the trunking Sabals, a Washington filifera, Brahea, Butia, Serenoa, nannohrops, and