Hi Carolyn - I'm probably odd-man-out with teas and such - if I can gather it in my no-chemical yard, or the local no-chemical park, I prefer to make my own (my oven doubles as a dehydrator.)

Often in late summer, my 3 season porch can look a bit like an old curing shed, with plants and seeds drying everywhere.

Others, like goldenrod, which I use as a dye, are boiling away on a gas hotplate on the patio. Then the concentrate goes into the freezer.

Just one of my quirks, along with putting random weeds (herbs) and flower in my summer salads. But I have 60 years of experience and training recognizing plants and herbs so I feel confident I won't harm myself or anyone else.
Sue