What are the best screening plants for the backyard?
These are our top ten screening plants,  all ideal for blocking out the neighbors and providing total privacy at maturity.  All are evergreen,  hardy and very tolerant of typical Australian garden conditions. 
Screening Tree FAQ's

Ficus Flash,  Pittosporum screen betweenDodonea Mr Green ScreenEleocarpus Blueberry Ash,  Grevillea Superb

For more advise about screening plants, see Online Plants