since Carolina cross are a hybrid , they wouldnt cross true, your best bet is to selectively grow from only the largest best tasting fruits,of a non hybrid plant

Perhaps they are de-hybridized.

try seedoutlet.com

i bought seed from "giant watermelon.com" this year and they are not doing as well as my store bought versions of the breed.they have been frozen, i'm not sure if that is the cause.2 tips for you- one melon per vine,,pull all others off,,,,,,,soaker hose versus sprinklers .i am experimenting with vine manipulation to produce larger fruit, but will not post the results untill the end of the season. best of luck

bethlaf: carolinia cross is just it's name it is not hybrid and has not been one since it's original breeding.

I believe that the "Kolbs Gem" Is a non hybrid that will grow to 100+ lbs. "Kolbs Gem" is actually one of the parents of the original carolina cross ..the authentic Kolbs Gem is a hard seed to find though.

www.rareseeds.com has them in stock now.

baker creek has Kolbs Gem watermelon