Dandelions are a part of Edmonton's natural landscape and their presence peaks through May and June. Residents will notice dandelions on City roadways, parks and boulevards. This year, a wet spring combined with sudden heat created the ideal growing conditions for dandelions to thrive.
Dandelion Treatment on Sports Fields
About 60% of the City’s 1,465 sports fields will be treated with iron chelate, a low-risk herbicide, beginning the week of July 17, 2017. It will take 2-3 weeks to complete treatment.
Fields should be avoided during spraying, but they are safe to use when dry - between 30 minutes and three hours after application, depending on weather. Signs will be posted to advise people when the fields are being sprayed.
A second round of treatment will be completed later this summer.
How the City Controls Dandelion Growth
The City works to prevent the spread of dandelions by mowing and trimming turf, with an extra mowing cycle during peak growing season.
As of mid-June 2017, weed populations had surpassed the thresholds identified in the City’s Integrated Pest Management Policy. The City is now taking action to ensure field conditions meet the standards outlined in the policy.
To ensure the safety and usability of our sports fields, all 1,465 fields across the city were assessed and treated with a low-risk herbicide (iron chelate) as needed. The condition of many of these fields will also be improved with top-dressing and aeration. Dandelions and other weeds on roadways and in parks will be mowed according to current practice.
Iron chelate is one of the safest broadleaf weed control options available as it dries quickly, does not have a strong odour, does not not leave a chemical residue on the grass, and poses negligible health or environmental risks. Grass growth will not be affected. Treated weeds turn a dark red-black colour, but they are safe to touch.
How You Can Control Dandelions on Your Property
City of Edmonton bylaws do not prohibit dandelions on private property.
As a property owner, you can control dandelions by:
- Mowing your lawn regularly
- Cutting weeds before they seed can keep them under control
- Routinely pull small patches of dandelions out of the ground by hand
- Keeping your lawn healthy — Healthy lawns make it difficult for weeds to seed and grow on your property