Nothing beats the taste of garden-fresh tomatoes, but their short shelf life often leads to waste. You’ve probably seen viral posts claiming you can preserve tomatoes for two years without vinegar using a simple trick. While long-term storage is possible, the method must be safe to prevent foodborne illness.
Here’s what you need to know.
Can Tomatoes Be Preserved Without Vinegar?
Yes—but not by simply sealing them in jars.
Tomatoes are naturally acidic, but many modern tomato varieties are not acidic enough to be safely canned without added acid. Food safety experts recommend adding bottled lemon juice or citric acid when canning tomatoes, even if you don’t use vinegar.
Simply placing fresh tomatoes in jars and storing them at room temperature is not considered safe.
A Reliable Way to Preserve Tomatoes
Ingredients
- 5–6 pounds (2.3–2.7 kg) ripe, firm tomatoes
- Bottled lemon juice or citric acid (recommended for safe canning)
- Canning salt (optional, for flavor)
- Clean canning jars with new lids
- Boiling water
Step 1: Choose Quality Tomatoes
Select tomatoes that are:
- Fully ripe
- Firm
- Free from bruises, mold, or cracks
Discard any damaged tomatoes.
Step 2: Wash Thoroughly
Wash the tomatoes under running water and remove stems.
Step 3: Peel (Optional but Recommended)
To remove the skins:
- Score a small “X” on the bottom of each tomato.
- Place them in boiling water for 30–60 seconds.
- Transfer immediately to ice water.
- Slip off the skins.
Step 4: Prepare the Jars
Wash jars in hot, soapy water and keep them hot until ready to use.
For each quart (1 liter) jar, add:
- 2 tablespoons bottled lemon juice, or
- ½ teaspoon citric acid
For each pint (500 ml) jar, add:
- 1 tablespoon bottled lemon juice, or
- ¼ teaspoon citric acid
This helps ensure a safe acidity level for canning.
Step 5: Fill the Jars
Pack tomatoes into the hot jars.
Leave about ½ inch (1.3 cm) of headspace.
Add 1 teaspoon of canning salt per quart if desired. Salt is optional and used for flavor—not safety.
Step 6: Remove Air Bubbles
Run a clean plastic utensil around the inside of the jar to release trapped air.
Wipe the rims clean and apply the lids.
Step 7: Process in a Boiling Water Bath
Place the filled jars into a boiling water canner and process according to your jar size, tomato style (whole, crushed, etc.), and altitude. Processing times vary, so follow an up-to-date, tested canning guide.
After processing:
- Remove the jars carefully.
- Let them cool undisturbed for 12–24 hours.
- Check that each lid has sealed properly.
How Long Do They Last?
Properly canned tomatoes stored in a cool, dark place are generally best used within 12 to 18 months for the best quality, though they may remain safe longer if the seal remains intact and there are no signs of spoilage. Claims that tomatoes will stay perfect for two years are not guaranteed, as flavor, texture, and nutritional quality gradually decline over time.
Signs You Should Throw Them Away
Never eat canned tomatoes if you notice:
- A bulging lid
- A broken seal
- Leaking jars
- Mold
- An unpleasant odor
- Foaming or unusual bubbles after opening
If in doubt, throw it out.
Tips for Best Results
- Store jars in a cool, dark location.
- Label each jar with the canning date.
- Use the oldest jars first.
- Avoid storing jars near heat or direct sunlight.
Final Thoughts
Preserving tomatoes is a wonderful way to enjoy their fresh flavor throughout the year, but food safety should always come first. While you don’t have to use vinegar, current food safety recommendations advise adding bottled lemon juice or citric acid when water-bath canning tomatoes to ensure they are acidic enough for safe storage.
With proper canning techniques and storage, you’ll have delicious tomatoes ready for soups, sauces, stews, and countless recipes long after tomato season ends.
