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Trees and roots

tree nursery

Trees are being killed everyday by homeowners, volunteers, and even landscape professionals...

Killing a tree is not difficult. It usually happens at the trunk collar, the bottom of the tree where the trunk and the root system meet. If you cover this part of the tree with soil and/or mulch and the roots are allowed to enclose the part of the tree that was designed to be above ground, these roots will strangle the trunk causing premature decline and death.

The crime begins at the nursery where the trees are planted too deeply in the soil. In addition, if they're grown in pots, the containers usually have smooth sidewalls. Thinking that they're imitating the experts, careful homeowners later plant the tree at the same soil level in the landscape. Finally, a thick layer of mulch is spread on top to complete the scandal. It's not a question of IF the tree will die; it's simply a matter of when.

Here at Woodlawn, we pay special attention to the root system of our trees. We take care to keep that trunk collar exposed. Furthermore, our trees are grown in root-pruning containers to minimize circling roots and promote a fibrous root system. This helps our trees establish very quickly in the landscape with minimal transplant shock.

We use RootMakers®.
RootMakers® are designed to create fibrous, non-circling root systems horizontally and vertically at all phases of production to equip plants for transplanting success. These products aren’t just “containers,” but rather root production tools. Each step prepares for the next, building upon the previous fibrous root system. A fibrous root system means a greater root tip surface area and translates into greater efficiency in absorption of water and essential elements; an increase in growth rate, establishment, and vigor; a higher transplant success rate; and ultimately, superior performance for your tree.

However, roots are not the whole tree.

Woodlawn also pays a great deal of attention to the limbs and structure of the crown. Lower branches are valuable to young tree development. Most contemporary nurseries maintain the practice of pruning the lower branches off young trees. Sometimes as much as the bottom half of the tree will be pruned. The buying public has come to accept this as the normal look of a young tree.

There are several reasons why this is not a good practice.

  • Sun-scald on newly transplanted trees is much more common when the lower branches are removed. With the lower limb structure maintained, sun-scald problems will be minimized or eliminated.
  • Lower branches are important in the development of good trunk taper. Trunk taper helps to assure a more durable structure, less likely to fail as the tree matures.
  • Root development and tree establishment are enhanced by lower branches.

How Many Lower Branches May I Prune?

A better question is, ‘'How many lower branches can I keep?". Until a tree is established in the landscape (usually one to two growing seasons with Woodlawn trees), all the lower branches should be protected if possible. After the tree is established, you should keep at least the top two-thirds of the tree in foliage.
Lower branches should not be allowed to become major limbs, especially if they will eventually be removed. Once a tree is established and the risk of sun-scald is minimal, the lower branches can be removed with little adverse effects for the tree.

So plant Woodlawn trees, take care to keep that trunk collar exposed, don't strip off lower branches, and you will leave a legacy, a tree that will continue to serve long after you're gone.