Is the splitting of the blossom ('tashaqquq al-tala') a necessary condition for the application of the legal ruling regarding fruit ownership?

Primary text

The ruling concerning the ownership boundary relates to the appearance of the fruit due to the splitting of the blossom, which is what is meant by 'ta'bir' (pollination/fruit bearing), not the mere act of pollination itself. Whether the blossom splits naturally or is split by a climber ('al-su'ad'), the ruling applies upon its appearance.