Palmer Amaranth (image) University of Illinois at Urbana-Champaign Caption Palmer amaranth grows very fast, germinates throughout the season, produces lots of seeds, can tolerate heat extremes and is very adaptable, researchers report. Credit Aaron Hager Usage Restrictions Image may be used only to accompany stories about the research described in this release. Credit required: Aaron Hager Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.