Zone 5 Planting Calendar: Spring, Summer, and Fall Windows

Zone 5 winters average yearly lows between minus 20 and minus 10 degrees Fahrenheit. Three planting windows follow from your frost dates, and each has its own rules.

Key points

Zone 5 shows winter cold only, so set windows from frost data.
Spring: hardy first, tender after the anchor.
Summer: manage heat and plan follow-on sowings.
Fall: count back from first frost and add days.
Write down what happened each season, and let your own record override any generic chart.

What does zone 5 tell you?

Zone 5 areas have an average annual extreme minimum winter temperature in the minus 20 to minus 10 degree Fahrenheit band. That helps with perennials, fruit and overwintering choices. It does not set spring or fall frost dates.

Use the zone to screen what survives winter, and use station frost tables to set the edges of your three windows.

Write your three windows on one sheet with the frost anchors at the top. Seeing the whole year at once makes it easier to spot where a bed is double-booked or where a gap could take another crop.

How do you set the spring window?

The spring window opens when soil can be worked and closes for each crop when it is too warm or too late for its days to maturity. Place hardy crops first, half-hardy crops near your spring anchor and tender crops after it, once soil is warm enough.

NC State Extension explains how to pick a frost threshold and probability level. A risk-averse grower uses the later date, and a risk-tolerant grower uses an earlier one with protection ready.

Soil temperature is the quiet partner of every window. In spring it tells you when seed will sprout, in summer it warns you when beds run too hot for cool-season sowings, and in fall it shows how fast the ground is cooling.

Hardy crops: soon after soil is workable.
Half-hardy crops: near your anchor.
Tender crops: after the anchor, in warm soil.

How do you plan the summer window?

Summer is the window for warm-season crops and for follow-on sowings. Heat can slow or stall some crops, so watch for stress, such as blossom drop in tomatoes. University of Illinois Extension notes that blossom drop is most common between 75 and 95 degrees Fahrenheit.

Succession sowings of beans, summer squash and quick greens fit this window if you keep them watered, and mulch holds soil moisture and keeps roots cooler.

Water needs change across the three windows too. Spring crops often get rain, summer crops may need irrigation, and fall seedlings need steady moisture to establish while it is still warm. Follow any local water rules when you irrigate.

How do you plan the fall window?

Count back from your first fall frost using days to maturity, and add extra days for slower growth as days shorten. Colorado State University Extension describes this method, with an example for the Denver area that places seeding for fall harvest in the middle of summer.

Cool-season crops tolerate light frost, so they can go in later than frost-tender crops. Beans and cucumbers need to finish before the first frost.

For example, if your first fall frost is the middle of October and a crop needs 60 days, count back 60 days and then add a week or two.

How do you fit the three windows together?

Think in beds. A bed might hold peas in spring, bush beans in summer and lettuce in fall. Mark the clearing dates and planting dates on your calendar, so each handoff is realistic.

Not every bed needs three crops. Leave some resting or in cover crop, especially if soil is thin or if you are short on time.

Keep a simple record of sowing dates and harvest dates. After two or three seasons, you will see which windows are generous on your farm and which are tight.

What mistakes should you avoid?

Treating the three windows as fixed dates is one. Another is forgetting that heat can close the spring window for cool-season crops earlier than you think. A third is planting fall crops too late and watching them stall as days shorten.

Check soil temperature and the forecast through each window, and keep notes for next year.

Ask neighbors who farm similar ground what dates they trust, and compare their experience with your own frost table.

How do you adapt the plan to your farm?

Start with your station's frost data, adjust for your own microclimates, and test the plan on a few beds before scaling up. Ask neighbors who farm similar ground what has worked.

Keep the plan flexible. Weather in zone 5 can shift by weeks from year to year, and a plan with margin handles that better than a rigid one.

When to get local help: Your county extension office or a certified crop adviser can confirm frost data and recommended windows for your area.

Sources and further reading

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

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