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Harvest, Storage & Post-Harvest TimingCanning and Preserving Calendar
Canning is a safety-critical craft. This calendar helps you schedule the work, but every recipe and process must come from a tested source.
Key points
- Use only current, tested recipes and processes from NCHFP, USDA or extension.
- Schedule canning days around harvest peaks, with flexibility.
- Inspect equipment and jars before the season.
- Check seals and discard anything suspect.
- Keep a tally of what you put up so next year's plan matches real use.
Why does canning need tested procedures?
Home canning depends on exact methods to keep dangerous organisms from growing in jars. Low-acid foods and acid foods need different approaches, and the details depend on the food, jar size and your elevation. This guide does not give those details.
Use only current guidance from the National Center for Home Food Preservation, the USDA or your state extension. Old family recipes and unvetted online instructions are not a safe substitute.
Preserving by canning is only one of several methods. Freezing, drying and storing in a cool place are often simpler and safer choices for a given crop, so look at all the options before committing a whole harvest to jars.
What goes on a preserving calendar?
Begin by listing what you will grow or buy and when it comes in. Then match each crop to a tested method from NCHFP, such as canning, freezing, drying or pickling. Last, mark the weeks when the work will happen.
For example, if your tomatoes usually peak in late summer where you farm, plan the canning days around that peak and keep the guidance for tomato acidity handy, since the tested instructions have specific requirements.
Check the guidance for each recipe's headspace, jar size and preparation steps, since these change from food to food and are part of what makes a process safe.
- List crops and expected harvest windows
- Match each to a tested method
- Set aside processing days
- Plan jar, lid and supply needs
What should you do before the season starts?
Check your equipment. Test or replace gauges as the manufacturer or extension suggests, inspect jars for chips and cracks, and buy new single-use lids as directed. Make sure your canner is the right type for the recipes you plan to use.
Read the instructions for each recipe ahead of time and gather everything before you start. Rushing through steps is a common source of mistakes.
Buy or collect supplies early. Jars, lids, bands and a rack that fits your canner are cheap compared with the cost of a delay in peak season, and stores run low when everyone is canning.
How do you time work around harvest?
Process produce soon after picking, when it is at its best. Plan for small batches, since a smaller batch is easier to manage safely and keeps the kitchen under control. Put the most time-sensitive crops, such as berries and sweet corn, first in the schedule.
Weather shifts timing. A cool spring or a hot spell can move harvest by days or weeks, so build a little flexibility into the calendar.
A schedule that includes a rest day between big batches is easier to keep. Tired people skip steps, and canning rewards patience.
How do you store and check finished jars?
Let jars cool and check seals as the tested instructions describe. Label with contents and date, store in a cool, dark and dry place, and use the oldest first. Inspect jars before opening and discard any that show bulging lids, leaks, spurting or odd smells. Do not taste to check.
Keep a list of what you put up, and note how fast each item was used.
Store jars without the bands if your tested guidance says so, in a place that stays cool, dry and away from direct light. Temperature swings and damp spots shorten the quality life of the food and can damage seals.
What if something looks wrong?
When in doubt, throw it out, and handle suspect jars carefully. NCHFP and extension offices explain how to dispose of questionable jars safely. Call your county extension office if you are unsure.
Do not substitute ingredients or change proportions in a recipe. Acid levels and density affect safety.
Local altitude changes some processing details, and your extension office can tell you how. Do not guess the adjustment. Ask for the current tested instruction.
How do you end the season?
After the last batch, note what worked and what you would change. Take stock of equipment, wash and dry it and put it away. Update your calendar for next year.
Review the NCHFP site each spring in case guidance has been updated before you start again.
It also helps to keep a simple tally of jars by type, so you can judge next year how much of each you truly need. Many households find they can with fewer jars of some items and more of others.
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.