Last and first frost dates in Annapolis

When is the last frost in Annapolis?

The last frost in Annapolis usually comes around 29 March: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 8 March, while corn waits until 5 April. The first autumn frost follows around 19 November, about 235 days later: harvest or cover frost-tender crops before then.

When to sow and plant

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

When the soil warms up in Annapolis

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 13 days before the last spring frost and 15 °C 22 days after it.

Frost dates near Annapolis

Of the nearest cities on our list, the last spring frost ends earliest in Dover (28 March) and latest in Harrisburg (10 April).

Seeds, seedlings and markets in Annapolis

Within 15 km of Annapolis OpenStreetMap lists 6 garden centres and 1 farm shop (collected 28 October 2026). The nearest garden centre to the city centre is Bru-Mar Gardens LLC, 3 km away.

• Bru-Mar Gardens LLC — garden centre
  Bay Ridge Road 1009, 21403 Annapolis · Mon–Sat 09:00–18:00; Sun 09:00–17:00 · 3 km · brumargardens.com
• Garcia Patios & Landscaping — garden centre
  Central Avenue 565, 21037 Edgewater · Mon–Fri 09:00–17:00 · 8 km · garciapatiosandlandscaping.com
• Gary's Gardens — garden centre
  Governor Ritchie Highway 651, 21146 Severna Park · 12 km
• Homestead Gardens — garden centre
  Mon–Sun 10:00–17:00 · 13 km
• Anne Arundel County Lawn and Garden Center — garden centre
  Jumpers Hole Road 478, 22146 Severna Park · 15 km

• Where to buy seeds and seedlings in Annapolis
• Selling your own harvest in the United States

Places: © OpenStreetMap contributors, ODbL.

Weather in Annapolis by month

Average weather in Annapolis over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: May–October (20.1–30.1 °C). Months that average 30 °C or more by day: July (30.1 °C). Nights average below 0 °C in January (-1.3 °C). About 1493 mm of rain falls in a year, on 139 days; July is the wettest month (200 mm) and November the driest (83 mm).

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).