Grafting is the technique of joining parts of separate plants in such a manner that they unite and continue their growth as one. Learn basic principles of grafting with an overview of different types of dormant-season grafts. Arnold Arboretum propagator Sean Halloran will provide step-by-step instructions on Saturday, March 16 from 9 – 12:30 in the Dana Greenhouse Classroom, 1050 Centre Street in Jamaica Plain, so that you can practice both cleft and side veneer grafts using apple root stock. Simple after-care will be required until planting out in springtime. Registrants will need to sign an Assumption of Risk and Release in order to participate in this class. Fee $62 Arboretum member, $75 nonmember. Register at my.arboretum.harvard.edu or call 617-384-5277.