I don't know the chances, but maybe you could just bag a couple of blossom on your Goose Creeks until a fruit forms to be certain of seed purity? Or maybe save seeds from some fruits that are on the far side, away from the Stupice....that may decrease your chances of a cross....

If you really want to be sure that your saved seeds are pure and since you have other varieties so close, the best thing to do is to bag blossoms.

And to know how to do that please go to the FAQ link at the top of this first page , click on the FAQ link and scroll down until you get to the excellent article on How To Prevent Cross POllination.

If the article doesn't answer all your questions then you can always come back here and post in your own thread.

Carolyn