After eating a Honeycrisp apple, I thought I would dry the seeds out and attempt the germination process, just for fun. One apple produced eight seeds, so I sat them on a paper towel to dry them before starting the winterizing process. In a matter of 3-4 days, however, the seed coating started opening and some of the inner white seeds have come out on their own. Is this normal? Does it impact the steps I should take to winterize the seeds to prepare them for germination/implantation?
Sometimes apples get "winterized" in cold storage before you buy them, and the seeds are already starting to grow inside the apple by the time they are sold.
I would just plant them as they are, and if they don't germinate within say 4 weeks then try winterizing the complete pot they are planted in. Don't try digging them up to see what is going on and risk damaging them.
Note, the seeds will NOT produce "honeycrisp" apples, they will be a hybrid of honeycrisp and whatever pollinated the parent tree. But if you plan to grow them for fun, that might not matter to you.