Extension Educator, Horticulture
One person's weed is another person's wildflower. A weed is just a plant out of place. We have all felt like weeds at times. A rose in a strawberry patch is a weed. The optimist's definition of a weed is a plant whose virtues are yet to be discovered. Weeds are just plants having to deal with an unhappy human. Weeds draw scorn, particularly in lawn areas. It is impractical to expect our lawns to be totally weed free all of the time. But according to Tom Voigt, U of I turf specialist, large numbers of weeds in a lawn can indicate certain problems such as:
Although it doesn't always hold true, certain weeds can be more prevalent under certain conditions. Voigt recommends learning to recognize specific weeds and their favorite conditions to help identify some lawn problems. Correcting these problems can help reduce the need for herbicides. Some of the common conditions and their weed indicators are:
Some weeds such as dandelions and quackgrass are not particular as to their environment or lawn conditions.
Weed problems can be lessened by proper lawn management. Weeds have a difficult time getting established in healthy competitive lawns. Mechanically removing weeds by hand or hoe can eliminate small numbers of weeds.
Herbicides can be used once proper lawn management and soil condition improvements have been initiated. Broadleaf weeds such as dandelions are often killed by using postemergent herbicides. As with all pesticides–read, understand and follow label directions.
When using postemergent broadleaf products follow these guidelines:
Wait at least 30 days following application before seeding into areas treated with post emergence broadleaf herbicides. Many broadleaf weeds can also be treated effectively during active growth in autumn.
Realistic expectations about our lawns and proper lawn management techniques can go a long way to control weed problems. Herbicides are another tool in weed control, but not the only tool.
There is a Lawn Workshop on Wednesday, April 15, 7:00pm at the Cooperative Extension auditorium at 1715 West Springfield Avenue. Learn the basics of establishing, maintaining and renovating a lawn.
The Master Gardener Idea Garden Workshop on planting a vegetable garden and starting a compost pile will be held Saturday, April 18, 9-11am at the Idea Garden on South Lincoln Avenue in Urbana. No fee or registration is required. For more information 217-333-7672.