Invasive Species Control

Invasive plant species in Ontario pose significant ecological, economic, and social challenges. These non-native plants have been introduced into Ontario's ecosystems through various means, including global trade, horticulture, and accidental transport. Once established, they can spread aggressively, outcompeting native plants for resources such as light, water, and nutrients, leading to reduced biodiversity and the disruption of local ecosystems.

GroGreen's management and control of invasive plant species in Ontario involve a combination of mechanical and chemical methods. Mechanical methods include hand-pulling, mowing, and cutting, which can be effective for small infestations. Chemical control involves the careful use of herbicides to target invasive plants without harming native species.

Japanese knotweed

Japanese Knotweed is a highly invasive plant in Ontario, posing significant challenges to native biodiversity and infrastructure. Originating from East Asia, this robust perennial can grow up to 3 meters tall, with deep roots that can penetrate concrete and asphalt, leading to substantial damage. It forms dense thickets that overshadow native plants, hindering their growth and leading to a loss in biodiversity. The plant's rapid spread and tough nature make it difficult to control. 

garlic mustard

Garlic Mustard threatens local ecosystems by outcompeting native flora. Originating from Europe, it rapidly colonizes forest floors, limiting light and resources for indigenous plants. Its allelopathic properties release chemicals inhibiting native plant growth, further disrupting biodiversity. Early detection is crucial for effective control. Its persistence highlights the challenges invasive species pose to Ontario's natural habitats.


Phragmites, known as European Common Reed, is a highly invasive species in Ontario, causing significant ecological damage. It forms dense stands along waterways and wetlands, outcompeting native vegetation, reducing biodiversity, and blocking access for wildlife and humans. Its rapid growth and extensive root systems alter habitats and hydrology, impacting native species and ecosystems. Efforts to control Phragmites in Ontario include cutting, burning, and applying herbicides.