Further we examined the overall visual quality (Fig. 4A) and off-odor (Fig. 4B) for each treatment. All calcium-treated samples retained superior quality over water-treated samples from d 7 of storage. The 10 mM CaCl2-treated samples had the least off-odor observed from d 7 until the end of storage and highest overall visual quality observed from d 14 until the end of storage with respective scores of 0.8 and 5.3 on d 21. In comparison, water-treated seedlings yielded an off-odor score of 3.8 and an overall quality score of 2.7 on d 21. The results indicated that the microgreens treated with 10 mM CaCl2 retained the best postharvest quality and the longest shelf life.