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Harvest, Storage & Post-Harvest Timing

Storage Crop Quality Check Calendar

A stored crop rarely fails all at once. A regular quality check catches small problems while there is still time to act.

Key points

  • Check often at first, then on a steady schedule.
  • Sample from many places, including the bottom and corners.
  • Act on patterns, not just individual bad items.
  • Keep simple records and ask extension when unsure.
  • Decide in advance what level of defects triggers action.

Why schedule quality checks?

Problems in storage start small, with a few soft items, a spot of mold, a sprout or a change in smell. A schedule makes sure someone looks while the problem is still small and the crop can still be sold, used or preserved.

Without a schedule, checks happen when you remember, which is usually when a smell tells you it is late.

A schedule also spreads the work. A ten minute check on a set day is easier to keep than a long, occasional inspection, and it helps whoever else works with you to know what to expect.

How often should you check?

Check often at the start, when the crop is adjusting, then settle into a routine. One approach is a weekly look in the first month and every two weeks after that, but the right schedule depends on the crop and the space. Extension storage guides give suggestions for each crop.

For example, a thin-skinned crop in a space that swings in temperature should be checked more often than a hardy one in a steady cellar. Adjust as you learn. Keep a few lots as reference, and compare them to the rest each time you check.

What do you look for?

Check the things your senses can tell you: color changes, soft spots, wet areas, mold, sprouting, shriveling, odors and pest signs. Check the room as well: temperature, humidity, airflow, condensation and leaks.

Look at the bottom of stacks and the corners as well as the top. The first signs of trouble often show up where air moves least.

Smell matters. A musty or sour odor is often the first sign of trouble, and it can come from a single hidden item. Follow your nose to the source.

How do you sample?

Take samples from different spots and depths, and do not just pick the best-looking items. Open a few containers and cut open a few items where that makes sense for the crop. Record what you find with a date and location.

A clear sampling plan, such as ten items from each of several crates, keeps the check consistent. Pick a number that fits your volume, and use it each time.

For crops stored in large piles or bins, use a probe or push your hand in to check the middle. Surface condition may not match what is inside, so check deeper than you think you need to.

What actions follow a check?

If you find a few bad items, remove them and look at the neighbors. If you find a pattern, such as soft spots all on one side of the room, look for a cause: temperature, humidity, airflow or a leak. Adjust the conditions, and check again soon.

If quality is slipping across the lot, change your plan. Sell sooner, move to preservation, share or compost rather than hoping it holds.

Decide in advance what the trigger is for acting, such as a share of items with defects that you find unacceptable. A clear rule keeps you from waiting too long, and your buyers or extension office can help set it.

How do you keep records?

A simple sheet with date, crop, location, condition notes, temperature and action taken is enough. Add photos if it helps. Over time, you will see which crops, varieties and spots cause trouble.

Use the record when you plan next year's crops and storage space. A photo taken from the same spot each week makes changes easy to see.

Who can help?

Your county extension office, a state postharvest specialist or a certified crop adviser can help you read what you see. Ask early if you are unsure, since many problems are easier to fix soon after they appear.

If you sell stored crops, keep your buyers informed when quality changes.

A short phone call to your extension office with photos of what you see can save a lot of guessing. Share your notes with buyers when quality changes, since early warning helps them plan too.

When to get local help: Ask your county extension office or a state postharvest specialist how to read quality signs for your crops.

Sources and further reading

Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.

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