You should select scaffold branches that have wide angles of attachment with the trunk, are spaced evenly and are distributed radially around the trunk. Optimally, major limbs should be spaced 24 to 36 inches apart on alternating sides of the stem. Trees such as maple and ash frequently have major branches occurring in pairs across the main stem. Pruning these alternately up to a height of 12 to 18 feet will create a structurally sound tree that is attractive and balanced. Never let one limb grow directly over a lower one.
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