Washingtonia robusta hardiness from seedling to mature

[flounder]

Hmm, I think I like Daves original idea. If I can carry it, I can protect it. When I can't carry, only then will I go into the building trade

[The Codfather]

on that note Dave.....what is an ideal mix to pot up in....is pot requirements and a basic how guide....i.e...full sun, lashes of water etc ???