FAQ
Common questions
Is home canning safe for beginners?
Yes, with tested recipes and correct technique. Botulism is the main risk, and it's nearly 100% preventable: use USDA-tested recipes, the correct method for your food's acidity, and new flat lids each batch. Don't improvise recipes until you've done several batches by the book.
What's the difference between water-bath and pressure canning?
Water-bath canning reaches 212°F and is safe for high-acid foods: jams, pickles, most tomatoes, and fruits. Pressure canning reaches 240°F and is required for low-acid foods: vegetables, beans, meats, and soups. Using water-bath for low-acid foods is not safe — you must match the method to the food's acidity.
Can I reuse old jars and lids?
Jars: yes, if they're free of chips, cracks, or rim damage — inspect carefully before each use. Flat lids: no. Each lid is designed to seal exactly once; the sealing compound is single-use. Rings (screw bands) are reusable as long as they aren't bent or rusty.
How long does home-canned food last?
Properly sealed, home-canned food is safe indefinitely, but quality degrades after 1-2 years. The USDA recommends using it within one year for best flavor and nutrition. Always check the seal before opening — if the lid flexes, the jar smells off, or you hear no 'pop' when you open it, discard it.
What should I can first?
Strawberry jam. It's the universal beginner project — high-acid, forgiving on timing, fast (under 2 hours start to finish), and immediately delicious. It teaches you every step of water-bath canning without the precision demands of pickling or tomatoes. Do jam first, then pickles, then tomatoes.
Do I need a pressure canner to preserve vegetables?
Yes. Green beans, corn, carrots, and most vegetables are low-acid, which means water-bath canning can't reach the temperature needed to kill botulism spores. You must use a pressure canner for those. The one safe exception: pickled vegetables, where added vinegar raises acidity enough for water-bath.