I don’t have a terrace but I do have a patio and a yard. That are smaller than even one of the terraces at Filoli. But there are a lot of great ideas here that work just as well on a smaller scale.
Above, the structure is softened with a vine and a loose, sprawling shrub. The shrubs at the corners bring more structure, but are softened with groundcovers. The containers are simple and substantial.
Go for broke with one really stunning container or object.
Line your patio with low maintenance, low water trees and shrubs like Arbutus Unedo (above) and Camellia Japonica (below). Keep your furnishings and containers simple, substantial, and well placed. The plantings keep this from looking too stark: full, lush trees and shrubs, groundcovers at the edges and between the pavers, succulents that spill over their containers.
tended 
What is the plant in the pot to the right of the bench? I’ve never seen it before – looks great
That’s an aloe plicatilis. I have one I bought in a 2″ pot as a single fan shaped rosette and it’s a couple of feet tall now.
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