Facts about Onions
- 09
Scallions and spring onions grown from seed bulbs mature in approximately 60-120 days, whereas sets planted from dormant bulbs reach harvestable size in just 3-4 weeks.
- 08
Storing onions in cool, dark, well-ventilated spaces can extend their shelf life to 2-3 months, while refrigeration at 0°C preserves them for up to 8 months.
- 07
In medieval Europe, onions served as a form of currency and were accepted as payment for rent and debts during the 13th and 14th centuries.
- 06
A single onion bulb can contain up to 15 layers of concentric rings, with each ring representing approximately one month of growth during the plant's development cycle.
- 05
Vidalia onions from Georgia contain approximately 5-7 percent sugar by weight, making them significantly sweeter than standard yellow onion varieties which contain 2-3 percent sugar.
- 04
The flavonoid quercetin, which comprises up to 10 percent of red onion dry weight, has been studied for potential anti-inflammatory and antioxidant health benefits in human nutrition research.
- 03
Egypt's Wadi el-Natrun region produced the majority of the world's onions during the 2nd century BCE, making them a staple export commodity along Mediterranean trade routes.
- 02
Tears form when onions are cut because they release a volatile compound called syn-propanethial-S-oxide, which irritates eyes within approximately 30 meters of the vegetable.
- 01
During the 2023 growing season, China produced approximately 110 million metric tons of onions, accounting for about 25 percent of global production.