What temperature maximizes onion storage life?

Accurate temperature management is what allows onions to be stored up to 8 months. I keep my onions at 32-40°F (0-4°C) with 60-65% humidity. This keeps respiration slowed down without freezing the bulbs. My root cellar maintains this steady temperature, keeping onions at a crisp texture for 8 months. The bad news? If the temperature exceeds 45°F, sprouting is initiated, breaking storage potential.

Humidity works in tandem with temperature when it comes to preservation. Too dry and your bulbs will shrivel. Too wet and you'll get mold. I utilize hygrometers in storage areas. Silica gel packs are handy during humid months. Maintaining proper moisture helps papery skins stay intact and necks stay sealed, thereby ensuring the longest lifespan.

Prepare ideal conditions without special conditions. Transform a closet with thermostatic controls. Insulate plastic bins in cool basements. I use stone walls in my cellar while still preserving natural coolness. Weekly check and adjust using ventilation or insulation as needed.

Avoid temperature swings. Daily fluctuations greater than 5°F can trigger the sprouting process. If your storage container is located near a heater or a sunlit window, it will likely fluctuate the most. During seasonal transitions, I check mine twice every day. Consistency is the key to perfectly preserving that delicious homegrown flavor!

Mastering temperature control rewards you with garden freshness year-round. Soups and stews gain depth from properly stored onions. That crisp texture transforms ordinary meals into extraordinary culinary experiences.

Read the full article: When to Harvest Onions: Complete Guide