German chamomile. Self-seeding annual with tiny daisy-like flowers excellent dried for tea. Closely related to Roman chamomile, which has many of the same medicinal properties. Harvest flower heads regularly for best yields. 24-30″ tall.
Spreading habit.

As well as a soothing tea, chamomile leaves can be used as an add-in to salads. Try mixing them into chopped butter lettuce dressed with olive oil, salt, and just a quick spritz of lemon.