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."
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."
Bull thistle is a prickly biennial that grows freely in disturbed soils, pastures, ditches, roadsides and unmanaged spaces. Read here to learn how to get rid of bull thistle and prevent this prolific weed from taking over your garden.
Canada Thistle Control: How To Get Rid Of Canada Thistle
Plants known as thistles don't all belong to the same species, but their similar appearance and the qualities they have in common -- toughness, prickliness and invasiveness -- make them universally despised. To devise a homemade strategy for eradicating thistles, you need to understand how the weeds grow. Many thistle species grow by both seed and...