dill seeds are available in regular grocery stores, in the spice section. you
buy them for recipes and pickle-making. a  half-cup would make a lot of strong
tea, i would think. you can buy them more cheaply at the bulk section of
health food stores. they are also easy to grow; in fact, they self-seed and
continue growing year after year. and they attract butterflies, one of the
nicest things about this plant.

carol brussel IBCLC
"pickle-maker"