JoAnn,
Remember, Store them upside down in paper sandwich bags. When picking the stalks, do it CAREFULLY as you will shed seed everywhere. I use fine clippers and support the stalk so it doesn't wiggle much.
Leave them for ~ 30-45 days in a dry space (mine are in the garage) and then crush the stalk while in the bag to get the last seeds out of the capsules. Then decant the seed and chaff mixture and store it in glassine envelopes at 4C in the crisper of your refrigerator (I put all the glassine envelopes in coin envelopes and the collection of coin envelopes in a Ziplock bag).
This year EVERYTHING set seed like mad. Wet spring followed by dry hot summer.
Kevin