When Spartacus was first introduced it was a very vigorous fairly tall plant with nice large lowers and the stems were adequate to hold up the flowers. It is really hard to find really good stock of Spartacus these days. In my experience, most of the sports have had a decline in plant vigor. The one that may have the most vigor is Vassio Meggos. JS Jenny is also above average. The purple sport was a poor growing flower that reached only 3 feet tall in my garden. None of the yellow sports have been vigorous and there have been several. Ginger Clack(Ember her daughter may be more correct) was able to get some seeds from Spartacus and I grew the seedling last year. It's name is CDP Ezra .
Bicolor is a fairly common sport in dahlias. It never is a stable sport and reverts back to a solid color the next year. If you know of one that was stable please let me know as I know of about 25 examples where the sport reverted and none where it was stable . Bicolors resulting from seeds are much more stable but not always.
