Australian Manuka honey is at least as medically powerful as New Zealand Manuka honey and in many instances is more potent.

Australia has 83 species of Leptospermum. New Zealand has only 1 species of Leptospermum.

The nectar from the flowers is harvested by bees; this is used to make Leptospermum honey. Honey produced from Australian Leptospermum polygalifolium, also known as jelly bush or the lemon-scented tea tree, has been found to contain up to 1750 mg/kg of ‘methylglyoxal’ (MGO), an antibacterial compound.

An explanation of why the MGO level in manuka honey does not show the antibacterial activity

However, after neutralization of this compound, the “manuka” honey retains bactericidal activity.