In my experience, if you don't find seedlings near the bush/tree, it won't be easy to grow from seed. Try pre-germinating them in a moist paper towel/baggie and see if they germinate. You may have to give them some cold hours, as well.

It would be best to post a picture of the shrub and seeds on the GW plant i.d. forum and find out what you have - then, you can research how best to germinate the seeds.

I agree. First step is to get the shrub identified.If you take a picture the Name That Plant Forum can almost certainly tell you what it is. Many shrubs are much easier and quicker to grow from cuttings than seeds. Plus if the shrub is a hybrid the seeds will not produce plants identical to the parent. Judging from your use of the term 'flower bulb' to denote the fruit/seed I assume you are a newby, so start with an id and we can help from there. Good luck.

Here is a link that might be useful: Name That Plant

the first step is to identify the plant to figure out what conditions the seeds need to germinate. Or you can provide a multitude of environments in order to determine the cultural conditions the seeds need, but that is going to be a difficult long term project. A lot of perennial seeds will stay in the starting medium for six months or more before sprouting.