I am going to make some cuttings of my Autumn Joy: Should I place several cuttings together to form a larger clump for next year? Will they "merge" together next year?
They will remain seporate plants but may be intertwined
Since you are doing it now, they will have time to grow a little this year. By next year each will duplicate too, so you want to keep that in mind so that you won't place them too close together.