I live in LA county, San Gabriel valley. Since my house in on elevation and facing a road.. I would like to put some privacy trees along the backyard property line. On some research, I found that "Thuja Green Giant" trees are good for privacy as well as they grow very fast ( 3 - 5 ft in one year).. However, except on internet, so far I have not found them in any of the nurseries I visited around my place.

Then today I found that this tree is good for a USDA zone 5 - 7 but LA has USDA zone - 10 -11.

So now my question - (1) Does any one of you know where can I see this tree in a nursery in LA county, if you or some one you know live in LA.

(2) Based on your experience & Knowledge, do you think this tree will grow fast in LA county ?

Your response will be appreciated.