Answer: Named varieties such as this would be sold only as plants or rooted cuttings and not by seed. You might find starter plants in your local store in the spring or blooming plants in the fall. Or, you may have to try mail order for spring delivery if you want to grow your own plants. Kings Mums, for example, has offered rooted cuttings of particular this variety in the past in their catalog. You may need to cut and paste the complete url into your browser to make it work correctly.
Best of luck with your search!
Q&A Library Searching Tips