There are quite a few plants that will work as hedges in that area. You actually have the option of a shrub or a larger grass such as pampass grass. Some specific shrubs that are evergreen include: Xylosma (Xylosma congestum), Newell Cestrum (Cestrum fasciculatum var. 'Newellii'), Scarlet Bottlebrush (Callistemon citrinus), Oleander (Nerium oleander), Natal Plum (Carissa macrocarpa), Lilac Hibiscus (Alyogyne huegelii).
The following web sites offer some ideas for native plants that are naturally adapted to the region.
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