Preparation of scion material The best scion material is obtained from the tips of mature (rounded) shoots with prominent buds (called tip wood) immediately before the August (winter) growth flush. Tip wood is prepared two or three weeks before use by removal of leaves from the scion, leaving 1 cm of petiole (leaf stem) remaining. The graft stick is cut from the mother tree when required and should be about 6-8 cm long. If not used immediately scions can be stored, wrapped in a moist towelette and plastic bag, in a cool, dark position for periods up to seven days. Ref: Terry Muller - WA Dept of Agriculture - Carnavon.