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Below you can find information about all the weeds regulated in the Alberta Weed Control Act. The information includes how these weeds can be identified and why they are regulated. 

To find a regulated weed faster, all weeds are separated into categories based on their regulatory designation, their growth form and the colour of their flower. 


Weeds by Regulatory Designation

Regulated Weeds by Growth Form

Trees & Shrubs

Trees and shrubs have a woody stem and are usually taller than flowering weeds. There are a few trees and shrubs regulated under the Alberta Weed Control Act.

Grass-Like Weeds

Grass-like weeds have long and narrow leaves and usually green, brown or straw-coloured flowers. This group includes all real grasses but also plants which resemble grasses such as sedges.

Regulated Weeds by Flower Colour

The colour of the flower is one of the most recognizable characteristics of many plants; but be aware that some plants can have flowers of different colours or colour variations. For example, among plants with usually purple flowers, single plants with white flowers are fairly frequent. Therefore, some weed species are listed in more than one colour category.

For More Information

Weed Management


In Edmonton: 311

Outside Edmonton: 780-442-5311


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