Broadleaf Weed – Pigweed

(Amaranthus retroflexus)

Also referred to as Rough Pigweed, Amaranth Pigweed, Green Amaranth and Careless Weed, Pigweed is a summer annual that is often found in bare or undeveloped areas thrives near the banks of rivers, streams and lakes. In residential lawns, this weed is often found in bare or undeveloped areas. Amaranthus retroflexus can be found throughout much of the continental United States.

Identifying Pigweed -

Pigweed can be identified as an vertical, freely branching weed, featuring stout, vertically growing stems. The lower part of the plant is thick and smooth, while the upper part is often branched and very hairy. “Green Amaranth” features blades that are dull green on top and hairy underneath. The veins on the lower surface are prominently white.

Pigweed reproduces by seeds produced from late summer throughout fall – or until severe frost sets in.

Pigweed Control -

Proper cultural practices, such as proper mowing and watering, can help to prevent Pigweed by creating dense turf, which inhibits the weed’s ability to grow. Physical removal (i.e. “weed pulling”) can be effective, although you will run the risk of spreading the seeds to additional areas of your lawn and landscaping.


Scotts LawnService recommends a selective systemic weed control program to fight Pigweed in your lawn, which ensures the herbicide is moved throughout the weed, killing it completely root and all.

Scotts LawnService is the trusted industry leader for professional quality lawn care. Our exclusive lawn care products include premium grass seeds and professional-grade fertilizers; our lawn service teams consist of highly trained, industry-certified professionals. Contact a representative today for Pigweed control options available in your area and to learn how you can enjoy a lush, thicker lawn that only Scotts LawnService can deliver.