I've read in here about collecting seed from geraniums, but I just can't seem to find the seeds. I have "regular" red geraniums...these plants have been growing for going on 2 years and still going strong. I'd love to get some seeds, but...when the stalk/flowers are dry, I've tried pinching them off and shaking them over white paper for seeds...no luck. I've tried dissecting the dried flowers and don't see anything that looks like seed. Advice???