The Canning Primer

Safety & Storage

These are the non-negotiables that keep home-canned food safe to eat, so it is worth getting comfortable with them early. The fundamentals are leaving the correct headspace, removing trapped air bubbles before sealing, and wiping every rim clean so the lid can seal properly. After processing, you check each jar: a sealed lid stays down and firm, and anything that did not seal goes into the fridge to use soon rather than onto the shelf. Label and date your jars, store them in a cool, dark place, and learn the warning signs of spoilage, such as a bulging or unsealed lid, leaking, off odors, or any mold. The standing rule is simple: when in doubt, throw it out, and never taste a questionable jar.

Safety & Storage

4 guides

Safety & Storage

Signs of Spoiled Canned Food (When to Throw It Out)

Learn the warning signs of spoiled home-canned food, from bulging lids to off odors, and how to dispose of suspect jars safely. When in doubt, throw it out.

August 15, 2026

Safety & Storage

How to Tell If a Canning Seal Failed

Learn three simple checks to confirm a good canning seal, what to do with an unsealed jar, and why band removal matters for long-term safety.

August 1, 2026

Safety & Storage

What Is Headspace and Why Does It Matter?

Headspace is the gap between your food and the jar lid. Get it wrong and your seal fails. Here's what it is, why it matters, and how to measure it correctly.

July 18, 2026

Safety & Storage

Botulism and Home Canning: What You Must Know

Learn how botulism risk in home canning works, which foods require a pressure canner, and the simple rules that keep every jar on your shelf safe.

July 4, 2026

← All topics