The eucalyptus tree, also known as a blue gum tree or Eucalyptus globules, is native to Australia and has an herbal fragrance. It is a tall tree with white flowers and oval-shaped blue leaves that turn green as they mature.

Lavender, also known as Lavandula angustifolia, produces beautiful pinkish-purple flowers that give off an intoxicating floral aroma. It is a water-wise plant that is indigenous to the Mediterranean area of Europe.

Rosemary, also known as Rosmarinus officinalis, is an herb indigenous to the Mediterranean coastline. It is part of the mint family and has blue-purple flowers and needle-like leaves that have a sweet herbal smell.

Peppermint, also known as Mentha piperita, is a hybrid plant of water mint and spearmint. It is indigenous to Europe and the Middle East. This plant has light purple flowers and serrated green leaves with a fragrant minty aroma.

Lemongrass, also known as Cymbopagon citratus, is a perennial grass cultivated in Southeast Asia. The grass is light green and has a lemony fragrance.