Im grow DP blueberry right now, 2nd week of flowering. I cut the top off a couple weeks ago for a clone, it took about 10 days to show roots. Now the blueberry is about 2 1/2 ft tall half the that height is the 2 tops i have now. Once it starts to stretch it takes off. It went from normal node spacing to 2 6in gaps between the nodes(it almost happens over night. Just starting to show some hairs, ill keep you updated.