Microgreens (IMAGE) Penn State Caption Microgreens are essentially the mature plant in miniature, with leaves, stems and roots. They are typically harvested after the stem has grown 3 to 5 inches tall and its first set of leaves appear. Credit Penn State Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.