Last Updated on October 22, 2026 by D. Ruddy
Preserving the harvest doesn’t get more rewarding than canning stewed tomatoes from fresh tomatoes. This method locks in peak flavor, reduces food waste, and gives you ready-to-use tomatoes for soups, sauces, and stews all year. Whether you have a garden overflowing with ripe tomatoes or scored a great deal at the farmers market, home canning ensures you always have high-quality stewed tomatoes on hand without added preservatives.
Canning stewed tomatoes from fresh tomatoes is a simple water bath process that preserves their rich flavor for 12-18 months. Use ripe, meaty varieties like Roma or San Marzano, peel and chop them, then cook with minimal seasoning before processing in sterilized jars.
Why Can Stewed Tomatoes at Home
Home canning stewed tomatoes gives you full control over ingredients and quality. Store-bought canned tomatoes often contain added salt, sugar, or preservatives that alter the taste. When you can at home, you decide what goes in—just tomatoes, maybe a pinch of salt, or your favorite herbs.
It’s also cost-effective. A single tomato plant can yield dozens of pounds of fruit, and canning lets you preserve that abundance. According to the National Center for Home Food Preservation, home-canned tomatoes retain more nutrients than commercially processed ones because they’re preserved at their peak ripeness.
Here are the key benefits of canning your own stewed tomatoes:
- Better flavor: Fresh, ripe tomatoes have a depth of flavor that store-bought can’t match.
- No additives: You control the ingredients—no hidden salt, sugar, or preservatives.
- Year-round availability: Enjoy summer’s bounty even in the dead of winter.
- Customizable: Add garlic, basil, or other herbs to suit your taste preferences.
- Economical: Save money by preserving your garden harvest or bulk purchases.
- Sustainable: Reduce food waste by using up tomatoes before they spoil.
Tip: For the best texture, choose meaty tomato varieties with fewer seeds and less juice, like Roma, San Marzano, or Amish Paste. These hold up better during cooking and canning.
Choosing the Best Tomatoes for Canning
Not all tomatoes are created equal when it comes to canning. The best candidates are meaty, low-acid varieties with thick flesh and fewer seeds. These hold their shape and texture better during the cooking and canning process.
According to university extension services, paste tomatoes are ideal because they have a higher solid-to-liquid ratio. This means less watery stewed tomatoes and more concentrated flavor. Heirloom varieties can also work well, though they may require more preparation to remove excess juice.
| Tomato Variety | Flesh Type | Seed Content | Best For |
|---|---|---|---|
| Roma | Meaty, thick | Low | Sauces, paste, stewed |
| San Marzano | Very meaty | Very low | Sauces, canning |
| Amish Paste | Thick, dense | Low | Canning, sauces |
| Celebrity | Firm, meaty | Moderate | All-purpose |
| Beefsteak | Firm, juicy | Moderate | Slicing, stews |
For best results, use tomatoes that are fully ripe but not overripe. Overripe tomatoes can be mushy and may affect the texture of your stewed tomatoes. If you have a mix of varieties, that’s fine—just aim for a majority of meaty types.
Equipment Needed for Canning Stewed Tomatoes
Having the right equipment makes the canning process safer and more efficient. While you don’t need a professional setup, a few key tools are essential for both safety and quality results.
The USDA recommends using a water bath canner for high-acid foods like tomatoes. This ensures proper heat distribution to kill any potential bacteria. You’ll also need canning jars specifically designed for home preserving—regular glass jars may crack under the pressure and heat.
Here’s a complete list of what you’ll need:
- Water bath canner: Large pot with a rack to hold jars, deep enough to cover jars with 1-2 inches of water
- Canning jars: Pint or quart-sized, with new lids and rings (check for nicks or cracks)
- Jar lifter: Special tongs for safely moving hot jars in and out of the canner
- Canning funnel: Wide-mouth funnel to fill jars without spills
- Bubble remover: Plastic or wooden tool to remove air bubbles from jars
- Lid magnet: Magnetic tool to lift lids from hot water
- Large pot: For blanching tomatoes (if peeling) and cooking the stewed mixture
- Knives and cutting board: For prepping tomatoes
- Measuring cups and spoons: For accurate seasoning
- Clean towels: For wiping jar rims and handling hot jars
Warning: Never reuse lids from previous canning sessions. The sealing compound can degrade, leading to improper seals and potential spoilage. Always use new, flat lids with each canning batch.
If you’re new to canning, consider investing in a canning kit that includes most of these tools. Many starter kits come with a canner, jar lifter, funnel, and bubble remover, making it easier to get started without purchasing each item separately.
Preparing Tomatoes for Canning
Proper preparation is key to achieving the best texture and flavor in your canned stewed tomatoes. This step involves washing, peeling, and chopping the tomatoes before cooking them down into a stewed consistency.
The University of Georgia Cooperative Extension notes that peeling tomatoes before canning improves the texture of the final product. The skins can become tough during processing and may not soften adequately during cooking. There are two main methods for peeling: blanching and freezing.
Here’s a step-by-step guide to preparing your tomatoes:
Washing and Sorting
- Rinse tomatoes thoroughly under cool running water to remove dirt and debris
- Discard any tomatoes with bruises, cracks, or mold spots
- Sort tomatoes by size for even cooking—smaller tomatoes cook faster
- Remove stems and any green parts, which can add bitterness
- Cut out any damaged areas with a sharp knife
Peeling Tomatoes
- Blanching method:
- Cut a small X on the bottom of each tomato
- Prepare a bowl of ice water
- Drop tomatoes into boiling water for 30-60 seconds until skins split
- Immediately transfer to ice water to stop cooking
- Peel off skins—they should slip off easily
- Freezing method:
- Place whole tomatoes in the freezer overnight
- Thaw slightly, then peel—skins will come off easily
- This method works well but may result in softer tomatoes
Chopping and Draining
- Quarter or chop tomatoes to your desired size
- For thicker stewed tomatoes, remove some seeds and juice
- To drain excess liquid, place chopped tomatoes in a colander over a bowl for 10-15 minutes
- Save the drained juice for making tomato sauce or soup stock
- Weigh or measure your tomatoes—most recipes call for about 20-25 pounds per canner load
Important: Never use tomatoes from dead or frost-damaged vines, as they may contain higher levels of solanine, a natural toxin. Also avoid tomatoes from diseased plants.
Step by Step Guide to Canning Stewed Tomatoes
Now that your tomatoes are prepped, it’s time to cook and can them. This process involves simmering the tomatoes to your desired consistency, then packing them into jars and processing in a water bath canner.
The National Center for Home Food Preservation provides tested recipes for canning tomatoes. For stewed tomatoes, you have flexibility in seasoning, but it’s important to follow proper canning procedures to ensure safety. The acidity of tomatoes can vary, especially with modern varieties, so adding acid is recommended.
Cooking the Stewed Tomatoes
- Combine tomatoes: Place your prepared tomatoes in a large pot. For pint jars, you’ll need about 12-15 pounds of tomatoes per canner load (7 pints). For quarts, plan for about 20-25 pounds per canner load (7 quarts).
- Add acid: Add 1 tablespoon of bottled lemon juice or 1/4 teaspoon of citric acid per pint jar (double for quarts). This ensures a safe pH level for water bath canning.
- Season (optional):strong> Add salt (1/2 teaspoon per pint, 1 teaspoon per quart) or herbs like basil, oregano, or garlic. Avoid adding fats like oil or butter, as they can affect the canning process.
- Simmer: Bring tomatoes to a boil, then reduce heat and simmer for 5-10 minutes, stirring occasionally to prevent sticking. Cook until tomatoes are softened but still have some texture.
- Adjust consistency: For thicker stewed tomatoes, simmer longer to reduce liquid. For a chunkier texture, mash some tomatoes with a potato masher but leave others whole.
Packing Jars
- Sterilize jars: Wash jars and lids in hot, soapy water. Keep jars hot until filling by placing them in a warm oven (200°F) or in the canner with simmering water.
- Fill jars: Using a canning funnel, ladle hot tomatoes into hot jars, leaving 1/2-inch headspace. Remove air bubbles with a bubble remover tool.
- Wipe rims: Use a clean, damp cloth to wipe the jar rims to ensure a good seal.
- Apply lids: Place lids on jars and screw on rings fingertip-tight (not too tight).
Processing in Water Bath Canner
- Prepare canner: Fill the canner with enough water to cover jars by 1-2 inches. Bring to a simmer (180°F) for hot packing.
- Load jars: Using a jar lifter, place jars on the rack in the canner, ensuring they don’t touch each other.
- Process: Once water returns to a full boil, start timing. Process pints for 35 minutes and quarts for 45 minutes. Adjust time for altitude if needed (add 5 minutes per 1,000 feet above sea level).
- Cool: After processing, turn off heat and let jars sit in the canner for 5 minutes. Then remove jars and place them on a towel-lined countertop, spacing them 1 inch apart.
- Check seals: After 12-24 hours, check that lids have sealed (they won’t pop when pressed). Store sealed jars in a cool, dark place.
| Jar Size | Processing Time (Sea Level) | Headspace | Yield per Canner Load |
|---|---|---|---|
| Pints | 35 minutes | 1/2 inch | 7-8 jars |
| Quarts | 45 minutes | 1/2 inch | 7 jars |
Remember that processing times may need adjustment based on your altitude. Always check a reliable canning guide for altitude adjustments to ensure safety.
Adding Flavor Variations to Your Stewed Tomatoes
One of the joys of canning your own stewed tomatoes is the ability to customize the flavor. While plain stewed tomatoes are versatile, adding herbs and seasonings can create specialized products ready for specific dishes.
According to a survey by the National Gardening Association, 67% of home canners experiment with different seasonings to create unique products. The key is to add ingredients that complement tomatoes without affecting the canning process’s safety.
Here are some popular and safe flavor variations to try:
Italian Herb Stewed Tomatoes
- Add 1 teaspoon dried basil, 1 teaspoon dried oregano, and 1/2 teaspoon dried thyme per quart jar
- Include 1-2 cloves of garlic (minced) per jar for extra flavor
- A pinch of red pepper flakes adds a subtle kick
- Perfect for pasta sauces, pizza, and Italian dishes
- Use fresh herbs by adding 1 tablespoon chopped fresh herbs per quart (dried herbs are more concentrated)
Mexican-Style Stewed Tomatoes
- Add 1 teaspoon ground cumin and 1 teaspoon chili powder per quart jar
- Include 1/4 cup chopped onions and 1 minced jalapeño per quart for heat
- A teaspoon of sugar can balance the acidity for a sweeter profile
- Great for chili, tacos, and Mexican-inspired dishes
- For a smoky flavor, add a small piece of chipotle pepper in adobo sauce
Mediterranean Stewed Tomatoes
- Add 1 teaspoon dried oregano and 1/2 teaspoon dried rosemary per quart
- Include 1/4 cup chopped Kalamata olives per quart for a briny flavor
- A splash of red wine (1 tablespoon per quart) adds depth
- Perfect for stews, casseroles, and Mediterranean dishes
- Add a bay leaf to each jar for subtle aromatic flavor
Simple Seasoned Stewed Tomatoes
- Add 1 teaspoon salt and 1/2 teaspoon black pepper per quart
- Include 1 teaspoon sugar to balance acidity if desired
- A sprinkle of dried parsley adds freshness
- Versatile for any recipe calling for canned tomatoes
- Keep it simple for maximum flexibility in cooking
Important: Never add thickeners like flour or cornstarch before canning, as they can affect heat penetration and safety. If you want thicker tomatoes, reduce the liquid before canning or add thickeners when using the tomatoes in recipes.
Common Mistakes to Avoid When Canning Stewed Tomatoes
Even experienced canners can make mistakes that affect the safety or quality of their preserved foods. When it comes to canning stewed tomatoes, some errors are more common—and more dangerous—than others.
The USDA reports that improper canning methods are a leading cause of foodborne illness from home-preserved foods. Tomatoes are high-acid foods, but modern varieties can have pH levels that border on low-acid, making proper procedures especially important.
Here are the most common mistakes and how to avoid them:
- Not adding acid: Even though tomatoes are acidic, modern varieties may not be acidic enough for safe water bath canning. Always add bottled lemon juice or citric acid to each jar to ensure a safe pH level below 4.6.
- Using overripe or damaged tomatoes: Overripe tomatoes can be mushy and may not hold up well during processing. Damaged tomatoes can introduce bacteria. Always use firm, ripe tomatoes and discard any with bruises or mold.
- Insufficient processing time: Cutting processing time short can result in underprocessed jars, which may not be safe to store at room temperature. Always follow tested recipes and processing times based on your jar size and altitude.
- Improper headspace: Too much or too little headspace can affect the seal and the quality of the final product. Always leave exactly 1/2-inch headspace for stewed tomatoes to allow for expansion during processing.
- Using non-canning jars: Regular glass jars aren’t designed to withstand the heat and pressure of canning. Always use jars specifically made for home canning, and check them for chips or cracks before using.
- Not removing air bubbles: Air bubbles trapped in the jar can affect the seal and may cause discoloration at the top of the jar. Always use a bubble remover tool to gently remove air bubbles before sealing.
- Reusing lids: The sealing compound on lids can degrade after one use. Always use new, flat lids for each canning session to ensure a proper seal.
- Adding unsafe ingredients: Some ingredients can affect the acidity or safety of the canning process. Avoid adding fats (like oil or butter), thickeners, or large amounts of low-acid ingredients like onions or peppers without following a tested recipe.
Warning: Never use the oven, dishwasher, or open-kettle method for canning tomatoes. These methods do not provide the consistent, high heat needed to kill bacteria and ensure a safe product. Always use a water bath or pressure canner as directed in tested recipes.
Storing and Using Your Canned Stewed Tomatoes
Once your jars have cooled and sealed, proper storage ensures they maintain their quality and safety. Canned stewed tomatoes can last for 12-18 months when stored correctly, though they’re best used within a year for optimal flavor.
The University of California Division of Agriculture and Natural Resources recommends storing canned foods in a cool, dark, dry place. Temperature fluctuations can affect the quality of the seals and the food inside. Ideal storage temperature is between 50-70°F.
Here’s how to store and use your canned stewed tomatoes:
Storing Canned Stewed Tomatoes
- Check seals: Before storing, ensure all jars have sealed properly. Lids should be concave and not pop when pressed. If a jar hasn’t sealed, refrigerate and use within a week, or reprocess with a new lid.
- Remove rings: Once jars are sealed and cooled, remove the screw bands to prevent rust and to make it easier to check for seal failure later.
- Label jars: Write the contents and date on the lid or label. Include any special seasonings or variations you added.
- Store properly: Place jars in a cool, dark place like a pantry or cellar. Avoid storing near heat sources, in direct sunlight, or in damp areas.
- Rotate stock: Use the oldest jars first to ensure you’re consuming your canned goods at their peak quality.
Using Canned Stewed Tomatoes
- Soups and stews: Add directly to recipes—no need to drain unless you want a thicker consistency.
- Pasta sauces: Use as a base for marinara or other tomato sauces. Simmer with additional herbs and seasonings as needed.
- Chili: The chunky texture works well in chili recipes, adding body and flavor.
- Casseroles: Mix with other ingredients in baked dishes like lasagna or eggplant parmesan.
- Salsas: Blend or chop further and combine with other ingredients for fresh salsa.
- Braises: Use as a cooking liquid for braising meats like chicken or beef.
- Pizzas: Drain excess liquid and use as a pizza sauce base.
| Storage Condition | Effect on Quality | Shelf Life |
|---|---|---|
| Cool (50-70°F), dark, dry | Best quality maintained | 12-18 months |
| Warm (above 70°F) | Faster quality degradation | 6-12 months |
| Fluctuating temperatures | Seal failure risk increases | 6-12 months |
| Damp or humid | Rust on lids, mold risk | 3-6 months |
If you notice any signs of spoilage—bulging lids, leakage, mold, or an off odor—discard the jar immediately. Botulism is a rare but serious risk with improperly canned foods, and it’s not worth taking chances with your health.
Frequently Asked Questions
Do I need to peel tomatoes before canning stewed tomatoes?
While it’s not absolutely necessary, peeling tomatoes before canning is highly recommended. The skins can become tough during processing and may not soften adequately during cooking. Blanching tomatoes for 30-60 seconds in boiling water makes peeling quick and easy.
However, if you prefer a more rustic texture, you can leave the skins on.
Can I can stewed tomatoes without adding lemon juice or citric acid?
No, it’s not recommended to can stewed tomatoes without adding acid. Modern tomato varieties can have pH levels that border on low-acid, and adding bottled lemon juice (1 tablespoon per pint, 2 tablespoons per quart) or citric acid (1/4 teaspoon per pint, 1/2 teaspoon per quart) ensures a safe pH below 4.6 for water bath canning. This step is crucial for preventing the growth of harmful bacteria.
How long do canned stewed tomatoes last?
Properly canned and stored stewed tomatoes will maintain their best quality for 12-18 months. For optimal flavor, it’s best to use them within a year. Always store jars in a cool, dark, dry place, and check seals before using.
If a jar shows any signs of spoilage—bulging lid, leakage, mold, or off odors—discard it immediately.
Can I use a pressure canner instead of a water bath canner for stewed tomatoes?
Yes, you can use a pressure canner for stewed tomatoes, and it may be necessary if you’ve added low-acid ingredients like onions, peppers, or meat. A pressure canner processes at higher temperatures, which is required for low-acid foods. For plain stewed tomatoes with added acid, a water bath canner is sufficient.
However, pressure canning can be a good option if you live at a high altitude or want to process larger batches.
Why did my canned stewed tomatoes turn out watery?
Watery canned tomatoes can result from several factors. Using very juicy tomato varieties, not draining excess liquid before canning, or undercooking the tomatoes can all lead to a watery product. To prevent this, choose meaty tomato varieties, drain chopped tomatoes in a colander before cooking, and simmer until you reach your desired consistency.
You can also reduce the liquid by cooking it down before adding the tomatoes to jars.
Final Thoughts
Canning stewed tomatoes from fresh tomatoes is a rewarding way to preserve the summer harvest and enjoy homegrown flavor year-round. By choosing the right tomatoes, following proper canning procedures, and adding your favorite seasonings, you can create a pantry staple that’s versatile, delicious, and free from preservatives. Whether you’re a beginner or an experienced canner, the process is straightforward and the results are well worth the effort.
Start with a small batch to perfect your technique, then scale up to fill your pantry with the taste of summer.
