ON
Onion
UN-yuhn • tunicated bulb
🟢 Non-Climacteric (Vine Only)
🛡 Low Ethylene
How to Tell if Onion is Ripe
Store CheckOnion is a non-climacteric fruit and does NOT ripen after being picked. It will only soften or rot. Buy it ready to eat.
👁 Visual Checks
- Look for uniform color without green under-tones
- Check for matte/dull skin rather than shiny plastic finish
- Look for natural sugar spots or field marks
✋ Tactile & Aroma
- Heft: Should feel heavy for its size (indicates juice content)
- Give: Slight yield under gentle palm pressure, never thumb poking
- Aroma: Fragrant sweet smell at the stem end
How to Store Onion
Optimal Spot
pantry
Shelf Life (Ripe)
30–90 Days
Ethylene Sensitivity
High (Isolate)
Storage Protocol: Store immediately in the refrigerator crisper drawer. Keep away from high ethylene emitters like bananas and apples.
Peak Seasonality & Harvest Geography
USDA / AMS Verified
Available year-round. Fresh spring/summer sweet onions arrive March through August; cured storage storage onions peak during autumn and winter harvests.
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Global Growing Geography:
Temperate and subtropical zones worldwide; led by China, India, Egypt, the United States (Washington, Idaho, Oregon, California), and Mexico
Common Varieties & PLU Codes
| Variety Name | PLU Codes | Characteristics |
|---|---|---|
| Yellow Onion | 4093, 4665 | Standard commercial supermarket cultivar |
| Red Onion | 4082 | Standard commercial supermarket cultivar |
| White Onion | 4663 | Standard commercial supermarket cultivar |
| Sweet Onion (Vidalia / Walla Walla) | 4166, 4159 | Standard commercial supermarket cultivar |
| Shallot | 4662 | Standard commercial supermarket cultivar |
Kitchen Pairings & Chef Hacks
Flavor Pairings
GarlicButterThymeBeefWineTomatoCheese
Chef Hacks & Prep Tricks
💡 No-Cry Chilling: Place whole onions in the refrigerator for 30 minutes or freezer for 10 minutes prior to slicing to drastically reduce irritating gas release.
💡 Root-Anchor Dice: Leave the root intact while making horizontal and vertical cuts; the root keeps all slices held together until the final dice.
Pocket Encyclopedia
Never buy under-ripe fruit again.
Carry tactile ripeness indicators, PLU barcode decoders, seasonal radar, and ethylene storage charts offline in your pocket.
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Compare sweetness, sugar content, and glycemic indicators against other fruits.