We have some really nice oleanders in the front of our house. The bloom all year due to a special overdose of homemade nitrogen fertilizer I feed them regularly. Despite being poisonous (to eat), we’ve never had any problems with the dogs messing with them.
They seem to produce seed pods throughout the year. I pulled off a few this afternoon in hopes to start growing some more. Years ago I bought some oleander seeds of ebay that I started to grow in my office at work. They did just fine and I gave a number of them away.