Poison Ivy Diffuser OilAt Demeter, we thought it was high time Poison Ivy gave people something better than a rash, so we decided to capture the great, fresh smell of Poison Ivy without the itching and scratching. Demeter's Poison Ivy is a sharp and woody green scent, mixed with earthy notes and weeds, reminiscent of the wild, untamed vine in the forest. The inspiration for Poison Ivy came when walking an English Mastiff, (a. k. a. a dog names Zephyr) in the country a walk