It has worked on any herb leaf i've tried (sage, oregano, scarlett sage, creeping charlie, edelweiss, mint). It has worked well with some flowers (lavendar), most fruits (cranberries, dates), and seeds (vanilla, green coffee bean). It also works well with fruit peels (orange, lemon).

Some flowers are trickier and may be best as spirits, but i don't have as much experience with them. Masé also said you need higher proof alcohols with barks and roots.

From what I've read, cannabis buds should be decarbed first before using them for tinctures. Heating the buds to 310-400F will help preserve the terpenes while converting the THCa to THC. This applies to high THC strains and high CBD strains.