Temperature range for canned goods
Temperature range for canned goods?
The question is about home canning in glass but I suspect the same applies to commercial metal cans.
I have read under 70 F and bad things happen fast at 100 F.
Is there a lower bound? If they freeze will they survive.
I want to set up an outdoor kitchen that I would use for home canning and cooking. I would like to build a cabinet for the canned goods (one reason is to keep them out of the sun). It will only get to less than freezing maybe a couple times a year and doubt they would freeze.
Is the lower bound above freezing?
Best Answer
I don't know that outdoors would be the best place to store your home canned goods. Even in an insulated cabinet, that the sun doesn't hit, the temperature in the cabinet may rise in the summer above recommended levels. Also, humidity may rust your lids(and bands, if you leave them on).
From Nation Center for Home Food Preservation
Label and date the jars and store them in a clean, cool, dark, dry place. For best quality, store between 50 and 70 °F. Also for best quality, can no more food than you will use within a year unless directions for a specific food provide other advice.
Do not store jars above 95° F or near hot pipes, a range, a furnace, in an uninsulated attic, or in direct sunlight. Under these conditions, food will lose quality in a few weeks or months and may spoil. Dampness may corrode metal lids, break seals, and allow recontamination and spoilage.
Accidental freezing of canned foods will not cause spoilage unless jars become unsealed and recontaminated. However, freezing and thawing may soften food. If jars must be stored where they may freeze, wrap them in newspapers, place them in heavy cartons, and cover with more newspapers and blankets.
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"Yes, heat is the enemy of all canned goods. Food stored in cans will spoil quickly if exposed to high temperatures, especially over 95 degrees F. It's best to store all your food in a temperature controlled environment that is kept at or below 70 degrees F." -- Does Canned Food Go Bad in the Heat?Do canned goods go bad in the cold?
Freezing a can will cause the food to expand, which can result in an imperceptible split in the seam. The split allows air inside and the contents to spoil. The amount of sugar or salt in the food makes no difference to whether it will spoil.How Long Does Canned Food Last? Survival Tip
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