That scar is an artifact of a process called grafting, or fusing two separate pieces of wood into a new tree. From citrus to ...

Artist Sam Van Aken fuses heirloom trees through a horticultural process known as grafting. He then plants them around the ...

Basically, when grafting, a wound of some type is made on the stock plant, and a piece of the scion plant is then inserted into the wound. The colors on this apple tree represent three different ...