Appearance: Prickly leaves off of tall stems topped by heavy purple flowers. Control: Mulch to prevent it; use a post-emergence herbicide or dig it out.
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;
How to get rid of Thistle weeds
Dandelions are pretty when they bloom, however they soon spread seeds by puffballs to take over your landscape and vegetable garden.