Good quality dry onions should be firm and hard with short, tight necks and dry papery skins. Slightly loose outer skin is common and should not affect quality. Avoid onions that show mold, decay, or blemishes.
Storing and Handling
Temperature/humidity recommendations for short-term
storage of seven days or less:
60-65 degrees F/16-18 degrees C
85-95% relative humidity
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PMA Fresh Produce Manual
Handling Tips
Handle onions with care to prevent bruising or decay. Spring/summer onions are especially susceptible to bruising due to high water and sugar content.
Troubleshooting
Water-soaked spots:
This is an indication of freeze damage. To prevent freezing injury, do not store dry onions below 30 degrees F/-1 degree C.
Green spots:
Dry onions may develop green spots if they are exposed to sunlight. For best quality, keep onions in a dark area out of sunlight.
Bruising:
Rough handling may cause bruising, especially with spring/summer onions. To prevent bruising, keep handling to a minimum; do not drop shipping containers on the floor.
Variety/Type Descriptions
Characterized by thin, light-colored skin and a sweet, mild flavor due to a higher water and sugar content. Because of their thin skins, spring/summer onions are more susceptible to bruising. Spring/summer onions may be red, white, or yellow in color.
Common Packaging
40- and 50-lb. cartons
5-, 10-, 25-, and 50-lb. bags
Grades
U.S. No. 1
U.S. Combination
Storing Tips
For extended storage, hold dry onions at 32-36 degrees F/0-2 degrees C. Maintain good air ventilation during storage; keep onions out of direct sunlight. Store dry onions away from foods that absorb odors.