The Australian Bonsai Gallery houses a number of mature and 'in-progress' trees; some more than 100 years old, most 25 to 49 years old. Most of the bonsai have been started as cuttings or seedlings, field-grown to develop some size, then container-grown to promote a refined style and root system. The trees are large! Some are well over 120 centimeters high. Over four decades of work has gone into producing this collection.