I would mark higher, if the staff were more knowledgeable, but they are not. Herbie's Herbs is a great place to go if looking for a fairly decent selection of herbs - verbena, lavendar, calendula, cinnamon, feverfew etc. But if you visit the shop be prepared to take of yourself. I have never gotten actual service.
If you want to deal with a proper Herbalist, I'd recommend Thuna Herbs on the Danforth. Herbie's Herbs isn't the place to go if you want a Herbalist consult, but it is decent enough to get any necessary herbal ingredients.