Landscape - Planting Too Deep and Too Shallow

The two most common problems in landscapes that we see are planting too deep and too shallow. The following is a short article on the subject.

When planting, look for the root flare, and plant the ball with the root flare level with the ground. If you plant too deep or too shallow plants will often fail in the landscape.

When examining a tree or shrub that has been planted too deep, be careful when uncovering roots. These plants often have been buried for several years and many roots have developed near the surface. These roots can be killed when uncovered. Adjusting planting depth is best done in spring after the weather settles to allow time for new root growth to develop and to allow the plant to adjust. Avoid doing this in the fall. Often it will be impossible to reset the tree or shrub without doing extensive damage to root systems.

Symptoms associated with planting too deep include wilting, stunted growth, chlorosis, dieback, early fall color, scorch and the development of adventitious roots off of trunks. Planting too deep restricts the amount of water and oxygen to the fine root systems, lowering the trees vitality. Trees planted too deep are also more subject to canker development and wind throw.

Planting too shallow can also be problematic. It can result in roots drying out, root death, and the plants being prone to water stress. Plant will be more shallow rooted and have reduced rooting leading to toppling in heavy winds and storms.

Gordon Johnson, Extension Horticulture Agent, UD, Kent County. Some information from the Michigan State University Landscape Alert Newsletter.