Jean's Greens is near me and is where I source any herbs I don't grow myself.
Mountain Rose Herbs is a wonderful company for any and all herb supplies, essential oils, containers, cosmetic clays, and more.
I purchase my essential oils at Plant Therapy or Native American Nutritionals - (with all due respect and love to my dear friends who swear by and sell Doterra or Young Living).
If you live in the greater Albany, NY capital district the Honest Weight Food Coop can also be a good source of various herbal supplies such as tiny jars for creams and tincture bottles with droppers.
Happy Herbal Adventuring! <3