OAKS

Many structural defects that occur in mature trees can be prevented by structural pruning when the tree is young. This practice can help property owners avoid the need for expensive tree care practices later in the life of the plant. It can also help extend the lifespan of the tree by reducing the risk of storm damage. 

Structural pruning when trees are young is intended to provide a strong branching habit to support future growth. Winter is the preferred time for this type of pruning because the structure of the tree is easily assessed when foliage is not present.
 
A key goal of structural pruning is to maintain a single stem and prevent formation of co-dominant leaders that are prone to failure. Permanent branches are selected that have the strongest attachments. Low branches are removed as the tree grows to provide clearance. Pruning provides even distribution of branches on the stem to maintain a desirable crown balance.