By Andi Anderson
Managing perennial grass weeds in cool-season lawns can be difficult because these weeds grow similarly to desired turfgrass. Their growth pattern makes it challenging to remove them without affecting the healthy grass.
One of the first methods to control these weeds is mechanical removal. Clumping grasses like tall fescue and orchardgrass can often be removed by digging them out completely. It is important to remove the entire crown and roots to prevent regrowth. However, grasses that spread through stolons or rhizomes, such as creeping bentgrass and quackgrass, are more difficult to remove. These require digging larger areas, as even small root pieces can grow again.
Cultural practices can also help manage weeds. Healthy and dense turfgrass naturally prevents weed growth by blocking sunlight. Regular fertilization, proper mowing, and avoiding overuse of the lawn allow grass to grow stronger. Resting the lawn and reseeding thin areas can also improve coverage and reduce weed problems.
Another option is using tarps to cover affected areas. Thick, dark tarps can block sunlight and kill weeds over time. However, this method may take several weeks, and repeated checks are needed to ensure all unwanted grass is removed before replanting.
Chemical control is also widely used. Herbicides that move within the plant can kill both the visible parts and roots. While glyphosate has been commonly used, it is now less available for home use. Alternatives like fluazifop can selectively target grassy weeds without harming turf. These products often require multiple applications for effective control.
For specific weeds like creeping bentgrass and nimblewill, repeated applications of certain herbicides may be necessary. Proper timing, correct dosage, and following instructions are important for success. In some cases, professional lawn care services may be helpful.
After weed control, maintaining a healthy lawn is essential. Practices such as fertilizing, watering during dry periods, and mowing at the right height help keep grass strong. Monitoring the lawn regularly also helps identify new weeds early.
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Categories: Michigan, Education, General, Rural Lifestyle