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Harvest Calendar for Vegetables by Month

A harvest calendar that lists vegetables by month only works if the months fit your climate. This guide shows how to build one from your own frost dates, planting dates and the days to maturity printed on the seed packet.

Why does a generic monthly harvest chart fail so often?

A chart that says peas come in June and pumpkins come in October describes one region in one kind of year. A grower on the Gulf Coast and a grower in northern Minnesota can be harvesting the same crop three months apart. Even within one county, a cold spring can push every date back by two weeks.

The fix is to anchor your calendar to events you can measure: the last spring frost, the first fall frost, and the day you actually seeded or transplanted. Months then become a label you fill in afterward, not the starting point.

How do you build the calendar from your own dates?

Start with a blank page that has a column for each crop. For each one, write the planting date, then add the days to maturity from the seed packet or your state extension planting guide. That number is counted differently for direct-seeded and transplanted crops, so check which one your source means.

Add a margin for weather. Cool springs slow growth, and a hot stretch can speed up crops like lettuce until it bolts. For example, if a packet says 60 days and you transplanted in a cool week, plan for the harvest to start a few days later than the arithmetic says, and note the real date when it happens.

• Column one: crop and variety
• Column two: planting or transplant date
• Column three: days to maturity from the packet
• Column four: predicted first pick
• Column five: actual first pick, filled in as you go

What groups of vegetables share a harvest rhythm?

Sorting crops into groups makes the calendar easier to read. Cool-season crops such as peas, spinach, lettuce and radishes tend to be ready in the cooler parts of the season. Warm-season crops such as tomatoes, peppers, cucumbers and squash need warm soil and nights and are ready later.

Storage crops such as potatoes, onions, garlic and winter squash are usually harvested once, then cured and stored. Continuous crops, such as beans, summer squash and cucumbers, are picked every few days for weeks. Iowa State University Extension, for example, suggests picking summer squash and cucumbers every two to three days, so mark those as repeating rows rather than single dates.

Which crops give a clear signal that they are ready?

Many vegetables tell you directly. Snap beans are ready when pods are about pencil-thick, while sweet corn is ready when a punctured kernel releases milky sap. Dry onions and garlic are ready when the tops fall over and begin to dry. Potatoes are ready to dig after the tops brown and die.

Write these cues in a notes column beside each crop. The date on the calendar is a prediction, and the signal in the field is the final word.

How do you plan around frost at the end of the season?

Work backward from your average first fall frost. Tender crops such as tomatoes, peppers and squash stop when frost arrives, so any planting that cannot finish before then belongs in a fall-frost-risk column. Sweet potatoes are usually dug around the time a vine-killing frost arrives, while rutabagas and parsnips tolerate cold and can wait.

Your local frost dates come from NOAA climate normals or your county extension office. USDA Plant Hardiness Zones describe winter minimum temperatures and do not give frost dates or planting dates, so do not build the calendar from zone alone.

Can a worked example make this clearer?

Suppose your last spring frost usually falls around the middle of May and you transplant tomatoes a week after that, with a packet that says 75 days from transplant. Count forward and you land in early August for the first ripe fruit, give or take a week for the weather. Now add a second row: bush beans seeded in the same bed, with a packet that says 55 days. Those come in around the start of July and can be pulled and replaced with a fall crop.

Doing that arithmetic for ten crops shows the shape of your year. You will see weeks when nothing is ready and weeks when six things are, and you can fix the gaps with succession plantings or by choosing varieties with different maturity lengths. This is an example only, so use your own frost dates and the days to maturity for your own varieties.

How should you handle crops that stay in the ground?

Some vegetables do not have a single harvest date. Carrots, beets, parsnips and kale can be harvested over a long stretch, and cold weather often improves flavor in several of them. Mark these as open-ended in your calendar with a note on when you expect to stop, such as when the ground freezes or when you cover them for protection.

Ask your county extension office which crops hold best in your area and how to protect them. Storage details belong with tested guidance from extension and the National Center for Home Food Preservation, not with guesses.

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

More in Harvest, Storage & Post-Harvest Timing

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• Harvest Calendar for Field Crops
• Harvest Calendar for Herbs
• Harvest Calendar for Cut Flowers
• Determining Harvest Readiness by Crop
• Harvest Timing for Peak Flavor