how big does a grevillea robusta grow and how quickly/
By Lindakevin
United Kingdom 
Recently purchased 3 dear little seedlings and in two weeks they have doubled in growth size.I had them in the south facing back garden but I am putting them in the North facing front garden near the wall, I have been assured they will thrive. Can I place them together approx 2 feet apart?
28 Jun, 2009
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Answers
Hi,Grevillea Robusta as far as I know,is an Australian tree, known as a Silky oak and has orange bottlebrush flowers when mature.
28 Jun, 2009
I have seen a G. robusta (Silk Oak) in Melbourne botanic gardens standing about 60ft tall. As said above though, in the UK it is just too tender and is used as a "spot" bedding plant or as a conservatory plant (with some pruning involved!).
28 Jun, 2009
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Bernieh
Grows from seed to 12inches in less than a year. It is, though, only a bedding plant, being frost tender, or else you can put it in a greenhouse or bring it indoors for the winter. Won't tolerate temperatures below 5 degrees C.
28 Jun, 2009