By Scout Nelson
North Dakota Extension specialists highlighted the importance of careful lawn chemical use as spring yard work begins. Many products used to control weeds can also harm trees and shrubs. Since woody plants are broadleaf plants, some herbicides meant for weeds may damage ornamental plants as well. Even when they do not kill plants immediately, repeated exposure may create stress and increase the risk of insects and diseases over time.
One common concern is the use of “weed-n-feed” products or granular fertilizer mixed with herbicide. These products may not drift through the air, but the chemicals can still move into trees and shrubs through their root systems. Many labels advise users not to apply products within the drip line of a tree or shrub. However, roots often extend beyond that area, so extra care is needed.
Runoff is another important issue. Heavy rainfall or too much irrigation can move chemicals into places where they were not intended to go. This may expose nearby plants to damage. Granular insecticides may also create problems if they are used incorrectly.
When using pesticides, the product label provides legal directions and should always be followed. Users should apply only the recommended amount and use the product only on approved plants or sites. Labels also explain how many times a product may be applied during one season. Too many applications or high rates may lead to chemical buildup in the soil. This can damage plants for months or even years.
Many homeowners may prefer safer weed control methods. Helpful options include making mulch rings larger around trees and shrubs, hand pulling weeds, or planting ground covers that grow thick enough to block weed growth naturally. These methods can reduce chemical use while keeping landscapes attractive.
Salt damage may also appear after winter. Deicing salts can injure landscape plants near roads and walkways. Flushing salts from soil with water early in spring may help. Organic mulch, such as wood chips, can reduce salt injury. Salt-tolerant plants placed near sidewalks may also lower future damage risks.
Careful planning, label reading, and safer lawn practices remain the best ways to protect woody plants during the growing season.
Photo Credit: gettyimages-fatcamera
Categories: North Dakota, General