Growth  - Growth is an increase in mass.  Trees grow as their meristems form cells that differentiate to be all the tissues and organs in a tree.  Trees grow as their meristems - apical, vascular - produce cells that form all parts of the tree.  Growth and maintenance are linked.  Energy is required to maintain order in new mass.
    Larger growth means more energy to establish new cells and to maintain the energy for metabolism.  At the same time, more energy must be stored to accelerate the system in spring.

Click here for old/new apical stem growth.

See "Growth Increment".

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