By Bonnie L. Grant Grafting is a common method of propagating fruit and ornamental trees. It allows the best traits of a tree, such as large fruit or bountiful blooms, to be passed on from generation to generation of species. Mature trees that have undergone this process can develop graft collar suckering, which is undesirable for numerous reasons. What is a graft collar? A graft collar is the area where a scion and a rootstock join and is also called a tree graft union. What is a Graft Collar? The union in a graft is a lumpy, raised scar that should be just above the surface of the soil. It is caused when the scion and rootstock are united. The scion is the variety of the species that produces and performs the best. The rootstock is a consistent propagator chosen by nurseries and breeders. The purpose of grafting is to
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