I don't know...lol...I thought you did. We have lots of bottlebrush bushes for many years but beats me where the seeds are, unless they are located on the brush itself. We've never had any "new" bushes come up so doubt if they ever come up from seeds alone.

The bushes used to hum with many bees but the last 4-5 years, there have been hardly any bees visit the bushes.