How do you decide when a root Graft has taken? The picture below is on a European beech. When repotting in the spring, I cut a grove in the trunk in an area with a gap in the roots. I took a small root and Looped it backwards towards the trunk and fastened it into the groove. The root is about twice the diameter it was now compared to originally, and the bark appears to have healed over. The thickening is causing a little swelling of the trunk in the area and so my question is how to know when I can separate the graft. In Photo below, the red arrow points to the loop, the yellow arrow points to the grafted root That I wish to keep.