Those are seeds from that seed pod. You can try to grow them from seed you you like. Oleanders do not make seed pod to often.

Those are seeds. Oleanders actually do produce a lot of seed in warm climates, such as in California. They grow easily from seed also.

They go to seed every year for me here in NJ. I would be very careful with those seeds though (especially indoors). Oleanders are highly poisonous. When I used to bring them into my home (now I overwinter in my garage), I would remove all those seed pots before bringing them indoors. (Just read that the seeds are among the most toxic part of the plant, in fact.)

This post was edited by njoasis on Tue, Jan 27, 15 at 15:20