Summarize the following:
Fresh seeds are likely to produce, but dried seeds have a low success rate. Alternatively, you can obtain fresh seeds from a garden supply store or other reputable dealers. If the seed pods open, the seeds will disperse, and you will not be able to use them to grow a new plant. They must be allowed to mature before removal; otherwise, the seeds may not be developed enough to grow. When the seed pods try to open, they are mature and ready for removal. Clip them off with a sharp knife or pair of scissors. Allow them to dry. Each pod should contain multiple "feathery" seeds.

Summary:
Obtain fresh seed pods from an active plant. When seed pods appear on an adult plant, wrap the pods with wire or twine. Remove the pods from the plant once they mature. Set the seed pods out on a flat surface. Remove the ties from the pod and gently crack it open with your thumbnail.