(Orange Jasmine) hedge plants , how fast , tall do they grow ?

Planning to plant Murraya Paniculata (Orange Jessamine) hedge plants , as a hedge in Sydney Australia. The plants are 30 cms tall, how long will it take to grow to approx.100 cms ? Is autumn ( now in the Southern Hemispehere) a good time to plant these ?
Any useful tip is appreciated, thanks.

Answers:
Well, unable to find anything really specific on how quickly it will attain 100cms, but here are a couple of things: "The shrub is well-suited to shearing into a formal hedge or screen and can take on a boxwood-like effect in a formal garden. Plant three to four feet apart for a hedge. However, rapid growth rate while plants are young assures that numerous shearings will be needed throughout the growing season. Growth slows with age."
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