Why Fruit Can Turn Dark
When Home Canning
by Jennifer Willis
(Provident Living Today)
There are five reasons why your fruit can turn dark when home canning.
- Fruit not processed long enough
- Temperature not high enough
- Water not at rolling boil at beginning of processing
- Water not kept at rolling boil throughout processing time
- Time was inaccurately counted
- Started time before rolling boil
- Failed to check time table
- Failed to make adjustment for altitude
- Boiling water level not one inch above top of jars throughout entire processing time (fruit at top turns dark)
- Packing fruits that should be precooked (pears, apples, pineapples)
Reasons for Failure in Canning
Utah State University Cooperative Extension
