I emailed them, asking how it is made. They said:
It is made from the Heliotrope flowers that we grown in the Gritman Garden. The flowers are put in a fat, we like to use Fractionated Coconut Oil, and we set out in the sun for at least 6 weeks sometimes over several months. We sift out the plant material and we are left with a wonderful smelling oil that herbal and essential oil properties. We wrote an article on the process, Making Macerations.
Let me know if you have any other questions. We are happy to help.
Sounds promising, I'll be ordering some.