Hi, I have a general question related to the root stock and scion of a Japanese Maple. Is the growth of the JM depends mainly on the root stock or from the scion?. For ex: I bought two Acer Palmatum 'Bihou' about the same time, both are 2nd yr grafted from the two different places in Oregon about 3-4 yrs ago. One of them now is about 5-6ft tall while the other slowly grows about 2 ft tall. So I was wondered is the strong root stock will help the tree grow faster or it is depended on scion? or any other factors that you can share with me. Thanks.