I can find no info about YELLOW FLOWERING Abelia. We have them intermixed with pink flowered plants at my church. I gathered seeds of both colors to plant in my yard [zone 5). Can I plant the seeds now? Blessings.
Abelia can be propagated by cuttings.
Seeds are sterile and will not produce.
There are many varieties of Abelia that are yellow in color including the varieties Lemon, Super Gold and Golden Anniversary to name a few.
Here are some links with more information.