The PLWA, in accordance to the the PLWMP Cosmetic Fertilizer & Soil Management Committee drafted recommendations is providing information and education about "Healthy-Lake Lawn Care" (see information & resources below).
The draft recommendations are that:
The use of residential lawn fertilizers be eliminated in the watershed and at the same time alternative practices be promoted.
Local Governments in the watershed bring in consistent regulations prohibiting the use of lawn fertilizers.
Watershed stakeholders advocate to the Province of Alberta to introduce legislation similar to the “Nutrient Management Act” of the Province of Manitoba.
The PLWA work in partnership with local governments to provide outreach and education related to lawn fertilizer elimination and alternative practices.
Further review of lawn herbicides (and other lawn care chemicals), be undertaken by the Cosmetic Fertilizer and Soil Nutrient Subcommittee.
This is all about moving away from synthetic fertilizers and harmful chemicals towards healthy soils that are self-sustaining and supportive of healthy lawns.
One method that seems to work, but is not scientifically proven is a vinegar solution. The acidity of the vinegar, made more potent by the salt, “sucks the water out” to kill the dandelions, while the soap
makes the mixture better adhere to the leaves. There are many different recipes available online, but it is suggested to use low salt mixtures with an organic biodegradable soap, two recipes:
a. More effective, more lawn kill: 1 gallon of vinegar (5% acetic acid) , 1 cup of salt, and 1 tablespoon of biodegradable dish soap
b. Less effective, less lawn kill: 1 gallon of vinegar (5% acetic acid) and 2 tablespoons of biodegradable dish soap
The vinegar solution works best when it is applied in dry sunny conditions and may require multiple applications because there is no residual action, allowing new weeds to grow in replacement. Wait at
least two weeks between applications to reduce the salinity and pH impact on the soil.
Caution: Use as a spot treatment and in small quantities only. As it may kill off healthy lawn, we suggest testing it on a small section first. As well, the salt and the vinegar can still impact the natural soil salinity and pH; therefore, it is best to use on driveways and sidewalks to limit the impact.
But I have WAY TOO MANY! Well then, maybe time to start over. Cover the area with weighted down cardboard or black plastic and you will kill all the ground cover by depriving them of sunlight. All plants need sunlight so blocking it out will eventually kill them and you can then seed new grass with the recommended mix of seed. This can take a little time but better for the soil and lake then killing them with chemicals. Read Marion Owen at: http://www.plantea.com/dandelions.htm