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Weeds in Prairiegrasses and Wildflowers
Managing weeds in a mixed stand of prairie grasses and wildflowers requires a thoughtful approach to help maintain the beauty of these natural landscapes. Here are some effective strategies to consider:
Seasonal Mowing and Shredding
Weeds are often the greatest cause of poor stands because they challenge the small seedlings in two ways:
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Take away necessary water and nutrients
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Shade and smother the young plants.
Mowing or shredding weeds often while prairie plants establish is an important tool to prevent your new seedlings from being smothered. Keep the mower blade as high as possible (6-8 inches is ideal) to allow desired plants to compete with quick-growing weeds.
Spring Maintenance
As a planting matures, it is recommended to mow or shred once in early spring before the prairie grasses and wildflowers break dormancy (March-April in the Midwest). Additionally, conducting a controlled burn on fully established stands (year 3+) can help to effectively manage weeds, small trees, and some cool-season grasses. This practice even helps stimulate the growth of many native plants! Always adhere to local regulations and acquire proper permits when burning.
In the fall and winter months, native plants left standing offer essential shelter for native pollinators and bird species, supporting biodiversity and acting as natural wind and snow breaks. PLUS, the longer native grasses and wildflowers are left standing, the higher the chance of natural reseeding!
Long-term Weed Management
As your prairie stand matures, the prevalence of weed problems generally decreases. However, vigilance is necessary to manage perennial weeds that may persist. Regular monitoring and timely intervention are crucial to maintaining the health and diversity of your prairie ecosystem.
Herbicide Considerations
While there are some over-the-top weed control options for native grass stands, incorporating wildflowers will limit the options for chemical control of broadleaf weeds. Spot spraying may be a viable option for smaller stands(less than 1 acre).
By implementing these strategies, you can effectively control weeds in your mixed prairie stand, promoting a thriving habitat for both grasses and wildflowers, and supporting the wider ecological community.
For more information on establishing & maintaining native grasses and wildflowers:
Long Term Management of Prairiegrasses
Long Term Management of Wildflowers (Patience is a Virtue)
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