I planted 10 claret ash trees a year ago & all are doing well except one that got broken off just above the top of the host rootstock. A new centre shoot grew right next to the broken off trunk & is about 1 mtr. tall now but it has leaves that are a lot larger than those on the other 9 trees. Also there are 6 other smaller shoots at ground level of the rootstock with leaves that are the same as the other 9 trees. I am confused which is claret ash & which should I prune.