Ackshually, most Apple varieties are patented.
Apple companies put in tons of effort in developing new varieties, and to keep control of their "intellectual property" they patent them.
Here, for example, is the now expired patent for the "Apple tree Cripps Pink cultivar."
https://patents.google.com/patent/USPP7880P/en
So, sadly, not actually open source unless you're dealing with a variety with an expired patent.
Further, traditional apples grown in the "Johnny Appleseed" type of way (from seed) resulted in mostly inedible apples, which is why things like the alcoholic beverages Apple Cider and Applejack were so popular at the time.
These days, to ensure apples are indeed tasty and edible, as well as tasting the same every time, they are generally clones much like bananas, instead of grown from seed.
