Grevillea sp. (Species unknown)

I suspect a cultivar of two of the native grevilleas, this is the flower. They like a low phosphate soil & soecial low phosphate fertilizers are made for them & similar natives. This one is fine without fertilizer, and survives on low or high rainfall, but when they'r flowering you know they're healthy http://www.abc.net.au/gardening/stories/s1866622.htm