Answer: Annual flowers can produce seeds, if you know what to look for! Geranums do produce seeds, but they're easier to grow if you take cuttings and grow them indoors over the winter months. Failing that, allow the flowers to remain on the plants until the petals fall off. Where a flower once was, a seed pod should develop. Wait until it dries completely and turns a tannish color, then carefully snip it from the plant directly into an open envelope (in case the seeds fall out when you touch it). Keep each seed type in separate envelope. Petunias will produce a roundish looking seedpod; vinca seeds are tiny and so are the seed pods so you might be better off purchasing a seed packet at your local garden center. The shoots sprouting from your geranium are not seed pods but could be cut off the plant and rooted in moistened potting soil. Hope this answers all your questions!
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