North Carolina has some great cities from Asheville to Charlotte to Raleigh to cover everyone's needs. No matter which city you are in, you can find some spots to pick up your yerba mate for your next hike or trip to the Outer Banks.
Earth Fare is an organic grocery store that should cover all your yerba mate needs. There's a really nice variety of loose leaf yerba mate for you to choose from for your home brew. They have multiple locations including one in Asheville but below is the Charlotte address if you're in Charlotte.
Address: 721 Gov Morrison St Ste 110, Charlotte, NC 28211
The Pauline Tea Bar Apothecary is a cozy cafe for you to satisfy your yerba mate needs along with plenty of other tea options. Stop by with one of your friends and chill.
Tin Roof Teas has a passion for tea and you can tell as soon as you step in their store. With over 250 teas to select from, of course including yerba mate, you have plenty of options.