Blueberry Automatic #1

Plants #1 and #2 are pretty healthy. #1 is with 15cm and #2 is 11cm high. Both start to show pre-flowers. The flush from last week on #3 worked and the growth restarted. I note that issues on plant #3 have something to do with the soil. It has more mud than usual and when it is dry it become compact (see mudcracks on photos). Wondering about transplant it, but still not sure. Cheers from Brazil!