Potatoes and onions are kitchen staples found in almost every household. Since both are commonly stored in baskets or pantry shelves, many people assume they can be kept together without any issues. However, storing potatoes and onions side by side may actually shorten their shelf life and lead to unnecessary food waste. If you’ve ever noticed potatoes sprouting too quickly or onions becoming soft and mushy, their storage conditions could be to blame. Here’s what happens when these vegetables are stored together and why experts recommend keeping them apart.

Why Potatoes And Onions Should Not Be Stored Together

Onions naturally release ethylene gas, a plant hormone that promotes ripening and ageing. While this gas helps certain fruits and vegetables mature, it can have an unwanted effect on potatoes.

When potatoes are exposed to ethylene gas from onions, they tend to sprout faster and may spoil sooner than expected. This not only affects their texture and taste but can also reduce their storage life significantly.

The Moisture Problem

Potatoes and onions have different storage requirements. Potatoes prefer a cool, dark, and slightly humid environment, while onions last longer in a dry, well-ventilated space.

When stored together, the moisture released by potatoes can increase humidity levels around onions, causing them to soften, mould, or rot. At the same time, onions can accelerate the deterioration of potatoes, creating a lose-lose situation.

Signs Your Potatoes Or Onions Are Spoiling

Potatoes:

  • Sprouting eyes

  • Green patches on the skin

  • Soft or shrivelled texture

  • Unpleasant odor

    • Onions:

    • Soft spots

  • Mould growth

  • Excessive moisture

  • Strong, unpleasant smell

    • How To Store Potatoes Properly

    • In a cool, dark place

  • Away from direct sunlight

  • In a paper bag, basket, or mesh container

  • At temperatures between 7°C and 10°C

  • Away from onions and fruits that release ethylene gas

    • How To Store Onions Properly

    • Keep them in a dry, cool area

  • Use mesh bags or open baskets for airflow

  • Store away from potatoes

  • Avoid keeping whole onions in the refrigerator unless peeled or cut

    • Can Any Vegetables Be Stored Together?

    Yes. While potatoes and onions are best kept apart, some vegetables with similar storage needs can be stored in the same area. Root vegetables such as carrots, beets, and turnips generally do well in cool, dark conditions. However, always ensure good airflow and monitor for signs of spoilage.

    Image credits: Freepik

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