The mallee tree typically grows to a height of 1 to 4.5 metres ( 3 to 15 ft ) .
The mallee tree typically can reach as high as 6 metres ( 20 ft ) .
The mallee tree typically grows to a height of 1 to 4.5 metres ( 3 to 15 ft ) but can reach as high as 6 metres ( 20 ft ) .