Preparing the Root Mass

Douglas L. Airhart & Guy Zimmerman III

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Transplanting Trees- Preparing the Root Mass:

In all cases, the root mass should be sufficiently moist prior to transplanting to allow root growth. It is difficult to moisten deep balls and containers once they are planted into a hole, back-filled and covered with mulch.

For B&B trees, all of the twine should be removed, no exceptions. If not, the twine will remain and constrict the trunk growth and eventually strangle the trunk. Most references will state that the burlap may be left on the ball because it will deteriorate under ground. Our observations indicate that this is not always the case.

The best suggestion is to cut off at least the top third of the burlap and remove it. This gives free access for growth of new roots into the hole.

Some references suggest just folding the top layer of burlap back away from the trunk. Some suggest tucking the upper flaps of burlap into the sides of the hole. Either of these practices will impede root growth or the roots will be damaged as they grow into the burlap layers.

(Figure 4-5) Tree Trunk Burlap

The contractor did not remove the burlap when transplanting this tree. It should be easy to see how the burlap may eventually constrict trunk growth. The burlap may also cause soil drying by allowing soil moisture to evaporate through the burlap from underground.

For containerized trees, remove the container and be sure to scruff-up the sides of the root mass to expose some loose roots. This technique will help to ensure good soil-to-root contact in the hole, and encourage new root growth out of the soilless mix. If you notice any roots beginning to encircle the root mass, be sure to cut them and scruff them out of the root mass to prevent continued circling growth in the future.

For bare-root trees, take the time to prune out any damaged or broken roots, or any roots entangled in the central mass. The root mass should be loosened so it can be positioned and manipulated to ensure that roots are growing down and away from the root flare of the trunk and into the hole (add figure of transplanted bare root).

Fostering Healthy Root Growth:

What’s needed for healthy root development and function?

	Suitable amounts of organic matter in the soil
	Suitable mulch over the root zone (drip line)
	As much suitable soil as possible for root growth
	Proper pH and texture, adequate water storage and drainage,
	Adequate mineral nutrition
	Correct amounts and types of mycorrhizae populations

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Purpose Right Tree / Right Place Selecting Trees Transplanting Trees Mulching & Staking Summary Diagram Pruning Trees Topping Hurts! Protecting Trees Tree Root Myths Pine Bark Beetles Live Christmas Trees Glossary List of Figures List of Video Vignettes Related Links Bibliography

TLCforTrees.info is maintained by: Douglas Airhart, Ph.D. Certified Arborist & Jeff Plant, Ph.D, Last Updated on: 07/11/03