Adults are on wing from April to October depending on the location.

[1] The larvae feed on various forbs, including Apiaceae, Asteraceae, Brassicaceae, Chenopodiaceae, Convolvulaceae, Fabaceae, Malvaceae, Plantaginaceae and Verbenaceae species.

[2] The common looper is thought to have recently moved into the greater niche provided by more soybean planting in its range, with larvae observed in the wild feeding on soybean plants in addition to their usual fare.

Notably, their digestibility and efficiency of food utilization for soybeans was not as high as with Pseudoplusia includens, suggesting host plant preference for common loopers is slightly different.

[2] Larvae of this species have 21–23 crochets per proleg,[4] and are bright green, with a small black marks (false eyes) on each side of the head.