As we move into springtime in the Rockies, it’s exciting to see our landscapes come alive with fresh new leaves and needles. Unfortunately, as is often the case, we are once again coming out of a winter that did not yield much moisture. Although many parts of the mountains had record snowfall, the Denver Metro area remained mostly dry with mild temperatures and windy conditions. These weather conditions can quickly dry out plant tissue and soils. The result is often the accumulation of salt in our soils.

The accumulation of salt can lead to lasting damage to our trees, especially a few species that are most sensitive to high salt levels in the soil. Trees that are common in Colorado and highly sensitive to increased salt levels include Spruce, White Pine, Scotch Pine, Maple, Hawthorn, and Serviceberry. We must be careful when planting these trees in our landscapes, and ensure that we prepare the site to promote optimum health. The ability to water these trees throughout winter also helps to alleviate the damage caused by high salt levels.

High salt levels in the soil decreases the availability of various nutrients to the plant. Key elements that are reduced when sodium levels are high include potassium, magnesium and calcium. High salt levels in the soil over a long period of time will also decrease the soil quality and make it difficult for water to penetrate the soil. The lack of moisture penetrating the soil will further decrease the ability of the trees to acquire vital nutrients. When salt levels reach very high levels it can even force water out of roots and into the soil through the process of osmosis. The osmotic balance must be restored so that nutrients can be dissolved in soil moisture and travel into the roots.

Damage in plant tissue can easily be seen in the spring in many Spruce trees all over town. The distinct lavender color in needle tissue is a clear indication that salt levels are concentrated and a problem exists. Nine times out of ten, these same Spruce trees showing signs of salt accumulation were not afforded water during the winter, have extreme southwestern sun exposure, or were planted in poorly drained soils. It is important to notice the signs of salt damage in our plants and react quickly to prevent lasting damage.

Call us at 303.232.0666 or contact us online below if you have any questions about your trees: