DavidMac:
Please try the Washingtonia hybrid W. filifera x W. robusta, known as the Filibusta palm. More hardy and can take the humidity due to robusta heritage./
Howfam
DavidMac: I suggest you try the Washingtonia filifera or the hybrid Washingtonia Known as the Filibusta (filifera x robusta). Filifera is hardy into the single digits ; filibusta should go well into the teens without much damage. I'd love to see tally covered with these beauties.