your gonna need fog or some kind of misting system. There is an artificially establihed coastal redwood forest thats been established in New Zealand and it actually grows faster than the California trees.
You dnt need to clone them. Forest service actually sells "volunteer sets" of sequoias buds that arise as buds from dead root segments of sequoias that have blown over or were "logged" and the buds arise from the stumps. They replant many of the new trees from these stump volunteers and then, with the extras, they sell at the main park gift shop (because the dead stumps produce hundreds of the little volunteers on an ongoing basis for up to 50 or more years).
Lots of conservatories have hundred year old specimens in large glass framed sequoia halls. Theres one in the national Gardens, Le Dew, (near Baltimore), Longwood Gardens (near Philly) . Theres even several up along the Maine Coast.
With the exception of the Maine Species, the others need to have "artificial foggers"