Canada Thistle "Type: Broadleaf perennial Size: To 6 feet tall and 3 feet wide Where it grows: Sunny lawn, landscape, or garden areas Appearance: Spiny, gray-green leaves and purple flowers. Control: Mulch to prevent it in landscape areas; use a post-emergence herbicide in lawns in spring or fall. Or dig it out by hand. Note: Thistle has an extensive root system that can grow several feet out from the main plant."
Learn about common weeds that grow in gardens or in lawns and how you can easily and safely prevent these weeds from growing, or get rid of the weeds if you already have them. Our common weed types include dandelion and crabgrass.
Musk Thistle "Type: Broadleaf biennial Size: To 6 feet tall and 18 inches wide Where it grows: Landscape and garden areas in full sun Appearance: Prickly leaves off of tall stems topped by heavy 2-inch purple flowers. Control: Mulch to prevent it; use a post-emergence herbicide or dig it out."