I thought you should know that your seeds from the Bronze Rocket will probably not produce plants that are of the high quality that the parent was. These hybrids are grown from the very first generation of a hybrid cross; subsequent generations will see a sharp decline in quality. Hybrids are best purchased as fresh (F1 generation) seeds from the company, or as plants.

You can save the seed, you can sow it, but there is NO telling what the outcome will be! I grow many different kinds of annuals and perennials each year. I can divide the perennials as they mature, but I simply purchase new annual seeds via catalogs.

Take a gander at the attached link. It explains the this hybridization and F1 process in a pretty easy to understand manner.

Here is a link that might be useful: F1 generation explanation