Canadian Thistle

• Size: Up to 5'
• Seasonal Habits: Perennial, emerges and flowers mid to late spring and can flower again in fall
• Toxicity: Produces nitrates so can be toxic to some species if ingested in large quantities

Canadian thistle is a very invasive weed that thrives in intense sunlight where groundwater is plentiful. It is a top producer of nectar sugar so it is very beneficial to pollinators that rely on nectar.