While one gardener's weed is another's salad, most everyone will agree that uninvited plants simply get in the way of what we want to grow. Here are profiles of 12 of the most common culprits to help you identify these unannounced guests.
Perennial; spreads by seeds; height to 1 foot; found in U.S. (not southernmost TX, CA, AZ, and FL) and southern Canada; can flower at any time when temperatures permit.
Dig out the entire taproot, hoe plants before they flower, and spread corn gluten in early spring to suppress seedlings.
Harvest young leaves for tender green salad.
Photo: (cc) Anders Sandberg/Flickr
Perennial; spreads by seeds; height to 18 inches; found across U.S. and southern Canada, mostly in lawns; flowers July through October.
Dig out entire root, or cut at soil line until root stops sprouting. Aerate and add organic matter to lawn. This weed tolerates compacted soil and shade.
Photo: (cc) Phil Sellens/Flickr