Common Purslane
Portulaca oleracea
Annual; spreads by seeds and rerooting; stems grow to 10 to 14 inches; found across U.S. and southern Canada; flowers August through October.
Hoe and remove plants. Pulled plants will reroot if left on top of soil. Seeds can mature after plant has been pulled. Smother seedlings with a deep mulch. Plant is edible.
Photo: (cc) Jason Hollinger/Flickr
Learn More: 8 Weeds You Can Eat.
Redroot Pigweed
Amaranthus retroflexus
Annual; spreads by seeds; height to 6 feet; found across U.S. and southern Canada; flowers July through November.
Till beds a week before planting to allow seedlings to sprout, then hoe them under, and mulch deeply. Pulled plants can reroot. Late summer and early fall seedlings can set seed when only a few inches tall.
Photo: (cc) Matt Lavin/Flickr
Read More: An Organic Weeding Strategy
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