Canning Acidic Foods: Fruits

FNH-00710 View this publication in PDF form to print or download.

Order a hard copy.

Besides the convenience and eating enjoyment of having home-canned foods on hand, there is a sense of personal satisfaction every time you open and serve a jar of fruit, fruit juice or fruit products.

Selection of Fruits

The quality of home-canned products is equal to the quality of the raw product you use. Select fruit evenly ripe, with a desirable color and flavor.

Fruit for canning should be fully ripened but firm. Unripened fruit is not as sweet as fully ripened fruit, and the natural flavor has not developed. Discard mushy, overripe and diseased fruit. Canning fresh fruit as soon as possible after gathering will help to hold all of the good flavor and nutritional value.

Fruits such as cherries, plums and berries should be carefully picked over and any overripe, bruised or spoiled ones discarded. They must be thoroughly washed to remove all traces of dust. Strawberries should be washed again after hulls are removed. Do not allow small fruits to stand in water.

Large fruits, such as apples, nectarines and pears, should be thoroughly washed before they are peeled.

Fresh apricots and peaches peel easier if dipped in boiling water for a short time to loosen the skin. Water should be at a rolling boil. Fruit should be placed in boiling water for a minute, then placed in cool water. Skins will split, making it easier to peel.

Fruit has a tendency to oxidize when exposed to air, which causes darkening of the fruit. It must be treated as soon as it is cut to preserve the natural color. To prevent darkening of fruit, use one of these solutions:

• 1 teaspoon, or 3,000 mg, powdered ascorbic acid in 1 gallon of water
• 2 tablespoons of salt and 2 tablespoons vinegar in 1 gallon of cold water
• ¾ cup lemon juice in 1 gallon water

Commercial antidarkening solutions are mixes of citric and ascorbic acids. Read label for powder/water amounts. Dip fruit in the solution as soon as it is cut. It can stay in the solution while you are preparing the jars for the boiling water canner.

Commercial preparations of ascorbic acid solutions, such as Fruit Fresh, Sure Fresh and Everfresh, are also available in grocery and hardware stores.

Hot Pack or Raw Pack

The hot-pack method requires a short precooking period. The boiling hot product is packed into clean jars, hot liquid is added, then it is processed immediately. The hot-pack method removes air from the tissues of the fruit, helps keep the fruit from floating, and increases the vacuum in sealed jars. After longer storage, both color and flavor of hot-packed foods tend to be better. Hot packing is recommended for apples, peaches, pears and pineapple.

The raw pack method is packing the raw fruit into the hot jar, then adding boiling liquid. Filled jars are then processed in a boiling water canner.

Canning Liquids

Water, fruit juice or syrup serve as liquids when canning fruit. All fruits may be canned successfully without sugar. Sugar helps to retain color and adds sweetness but is not necessary to prevent spoilage. However, fruits canned without sugar will have a less firm texture. Home-canned fruits can be adjusted to the sweetness your family prefers with the liquid chosen.

Syrups for Canning

Medium with corn syrup: Use 1 1⁄2 cups sugar, 1 cup corn syrup to 3 cups water.

Medium with honey: Use 1 cup sugar, 1 cup honey to 4 cups water.

Syrup instructions: Boil sugar and water together 5 minutes.

*The liquid may be water or juice extracted from fruit. To extract juice, crush ripe, sound fruit. Place in pot, simmer. Strain.

Boiling Water Canning

A boiling water canner may be purchased, or it can be made from a large pot deep enough to permit water to cover jars 1 to 2 inches over the top with space above for boiling water to remain in the canner. The canner must have a rack to hold the jars at least ½ inch above the bottom of the canner. The rack must allow water to circulate under the jars. The canner should have a cover that keeps water at a good rolling boil during processing.

1. Before the preparation of the food begins, center the canner on the heat source. Heat the water in the canner while the fruit is being prepared. Water should be preheated to 140°F for raw pack or 180°F for hot pack.
2. Clean the jars; place in canner to preheat. Clean the lids and screwbands; set aside.
3. Prepare fruit according to directions for raw- or hot-pack canning as given. Prepare only enough jars of food at one time to fill the canner. Work rapidly so as little time as possible will elapse between precooking or packing the food and getting it into the canner.
4. Place fruit pieces, then liquid, into jars; release air bubbles. Check for correct headspace. Clean the rim of the jar with a damp towel. Center a flat lid on top, then add metal screw band to fingertip-tight.
5. Place filled, lidded jars on the rack in the canner. Place apart to allow water to circulate around entire jar. Hot water should be 1 or more inches above top of jars. If water does not cover jars at least 1 inch over the top, add boiling water to this depth. Place the cover on canner.
6. Start counting processing time as soon as the water in the canner reaches a good rolling boil. Keep the water boiling during the entire processing time. If the water level goes down, add sufficient boiling water to keep it at the required height.
7. Process the required length of time. If the water stops boiling at any time during processing, bring water back to boil. Start timing from the beginning when boiling restarts. See table at the bottom of this page.
8. When processing time is done, remove jars from the canner in upright position. Do not tighten screw bands again. Set jars 1 inch apart on a rack or thick towel at room temperature for 12 to 24 hours. Do not set hot jars in a draft or on a cold, wet surface. Do not cover them.
9. When jars are cool, test for seal and remove screw bands. Wash and dry bands. Bands are unnecessary once jars are sealed. Wipe jars and lids. Label and store in a cool, dry, dark area.
10. If a jar did not seal, it must be reprocessed within 24 hours, stored in the refrigerator and used within regular storage time, or frozen for longer storage.

References

USDA Complete Guide to Home Canning. Online version: www.uga.edu/nchfp/publications/publications_usda.html. Print version: https://mdc.itap.purdue.edu/item.asp?item_number=AIG-539#.VWTLiZRdWrY.

National Center for Home Food Preservation. University of Georgia Cooperative Extension Service: www.uga.edu/nchfp.

Using Alaska’s Wild Berries & Other Wild Edibles, University of Alaska Fairbanks Cooperative Extension Service, www.uaf.edu/ces.

Canning Fruit in Jars

Process Time (min.), Boiling Water Canner

0–1000 feet, 1001–3000 ft*

*Altitude adjustment: If you live at a higher altitude, check with Cooperative Extension Service.

**To sterilize, place clean jars in water. Bring to boil; boil for 10 minutes.

Note: Some fruits may be canned in a pressure canner. Go to www.uga.edu/nchfp for instructions.

To simplify information, trade names of products have been used. No endorsement of named products by the University of Alaska

Fairbanks Cooperative Extension Service is intended, nor is criticism implied of similar products that are not mentioned.

Julie Cascio, Extension Faculty, Health, Home and Family Development. Originally written by Roxie Rodgers Dinstel, former Extension Faculty, Health, Home and Family Development.

Reviewed October 2021