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Mid-Atlantic Planting Calendar

The Mid-Atlantic gives growers a long spring, a hot and humid summer and a generous fall. That means many crops can be planted twice, if you plan for heat on one side and frost on the other.

Why does the Mid-Atlantic allow two planting windows?

From the Chesapeake Bay to the Appalachian foothills, the Mid-Atlantic growing season is long enough that cool-season crops can go in early spring and again in late summer. Spring plantings race the heat, and fall plantings race the first frost and shortening days.

The calendar therefore has a gap in the middle. Midsummer is often too hot for lettuce and spinach to do well, so many growers pause those crops and focus on tomatoes, peppers, beans, squash and sweet corn, then return to leafy crops as nights cool.

How do frost dates vary across the region?

Within a few hours' drive you can move from coastal plain with a long season to piedmont and mountain valleys with a much shorter one. Elevation and distance from the bay and ocean shift the last spring frost and first fall frost by weeks. Cold air also settles in valleys, which makes valley floors riskier on clear spring nights.

Use station records from the National Weather Service or NOAA, and ask your extension office which station best matches your site. The USDA hardiness zone tells you about winter minimums for perennials. It does not tell you when to plant beans.

• Compare the nearest station's elevation with your own field.
• Note whether your site sits in a low pocket.
• Keep a yearly log of actual last and first frosts.

When do you plant spring crops before the heat arrives?

Peas, spinach, lettuce, radishes, onions, potatoes and brassica transplants are spring crops that handle cool conditions. Aim to get them established while the soil is workable and temperatures are mild, because heat can make lettuce bolt and cause peas to stop setting pods.

Choose varieties described for heat tolerance or bolt resistance, and consider shade cloth for crops you want to stretch into early summer. Check your state extension planting guide for the range for your area, because the Mid-Atlantic spans several climates.

How do you handle summer heat and humidity?

Warm-season crops thrive here, but humidity brings disease pressure. Spacing, airflow and crop rotation reduce leaf wetness and carryover of disease in the soil. Drip irrigation keeps foliage drier than overhead watering, and morning watering gives leaves time to dry.

For pests and diseases, scout first and identify the problem before acting. Control options, including any pesticide, must follow the label, observe pre-harvest intervals and protect pollinators. Applicator licensing rules vary by state, so confirm requirements with your state department of agriculture.

When do you start fall crops?

Fall crops are planted in the heat of late summer, which surprises new growers. Work backward from your first fall frost: take the days to maturity listed for the crop, add a buffer because growth slows as days shorten, and count back to a planting week. Crops such as kale, collards, carrots, beets and turnips often handle light frost well and may taste better after cool nights.

Seed beds dry out quickly in late summer. Keep seeded rows evenly moist until they emerge, and consider shading seedlings during hot afternoons.

How do you put the calendar together?

For example, if your last spring frost usually falls in mid-April, you might sow hardy crops in the weeks before that date and set out tomato plants a couple of weeks after it. If your first fall frost usually falls in late October, you would count back from it to place your fall seedings. These are worked examples of the method, not recommended dates for your farm.

Record every planting date, emergence date and harvest start. After one season you will have a calendar built on your own results. Verify local recommendations with your extension office, and rely on a soil test for fertility decisions, noting that nutrient management rules vary by state.

What should you check before each planting, and what mistakes should you avoid?

Before every sowing, run through a short list. Look at the ten-day forecast for a cold snap or a heat wave, test the soil with a thermometer, and feel the soil for workability. A calendar tells you when to start looking, and these checks tell you when to act.

Also confirm that seed or transplants are ready. Transplants that are leggy or root-bound do poorly, and old seed may germinate unevenly. Keep seed packets in a cool, dry place and note the packed-for year, and run a simple germination test on old seed if you are unsure.

Three mistakes repeat. First, planting cool-season crops too late in spring so heat arrives before harvest. Second, starting fall crops too late so frost arrives before maturity. Third, overwatering in humid weather, which invites root and leaf disease. A fourth, quieter mistake is skipping crop rotation. Planting the same family in the same bed year after year builds up soil-borne problems. Rotate by plant family and ask extension for a rotation plan that fits your crops.

• Forecast for the next ten days
• Soil temperature at seed depth
• Soil workability
• Irrigation ready for dry spells

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

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