Frost dates for 21401 — Annapolis, MD
Last spring frostMar 27median date
First fall frostNov 13median date
Growing season231 daysfrost-free
Hardiness zone7bZone 7b
How Annapolis compares
- In 8 years out of 10, the last spring frost in Annapolis falls between March 9 and April 9, a 31-day window. The first fall frost falls between November 1 and December 1.
- The median last frost is 9 days earlier than the Maryland median of Apr 5.
- Its 231-day growing season is longer than 89% of the 431 Maryland places with a regular frost season (state median 216 days).
- The last frost is 9 days earlier than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 81 nights a year at or below 32°F.
- Compared with Glen Burnie, MD, 13 km away, the last frost here is 14 days earlier than there and the growing season is 27 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 9 |
| 50% (median) | March 27 |
| 10% (safe for tender plants) | April 9 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 1 |
| 50% (median) | November 13 |
| 90% (late) | December 1 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Annapolis, MD
Frost dates for 21401 — Annapolis, MD — last frost Mar 27, first frost Nov 13, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 2 to Jan 16Transplant outside: Feb 27 to Mar 13
Start indoors: Jan 16 to Jan 30Transplant outside: Apr 10 to Apr 24
Start indoors: Jan 16 to Jan 30Transplant outside: Apr 10 to Apr 24
Start indoors: Jan 30 to Feb 13Transplant outside: Apr 3 to Apr 17
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 6 to Mar 20Sow outdoors: Feb 27 to Apr 3Plant for fall: Sep 18 to Oct 16
Start indoors: Jan 30 to Feb 13Transplant outside: Feb 27 to Mar 13Sow outdoors: Feb 27 to Mar 13Plant for fall: Sep 4 to Sep 25
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 13 to Mar 27Plant for fall: Aug 7 to Aug 28
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 6 to Mar 20Plant for fall: Aug 7 to Aug 28
Start indoors: Jan 30 to Feb 13Transplant outside: Mar 13 to Mar 27Plant for fall: Aug 7 to Aug 28
Start indoors: Feb 13 to Feb 27Transplant outside: Apr 17 to May 1Sow outdoors: Apr 17 to May 1
Start indoors: Feb 13 to Feb 27Transplant outside: Apr 3 to Apr 17
Sow outdoors: Feb 13 to Mar 6Plant for fall: Aug 21 to Sep 11
Sow outdoors: Feb 13 to Mar 6Plant for fall: Sep 18 to Oct 9
Sow outdoors: Feb 20 to Apr 3Plant for fall: Oct 2 to Oct 23
Start indoors: Feb 27 to Mar 6Transplant outside: Apr 10 to Apr 17Sow outdoors: Apr 3 to Apr 17Plant for fall: Aug 28 to Sep 11
Start indoors: Feb 27 to Mar 6Sow outdoors: Apr 3 to Apr 17Plant for fall: Sep 4 to Sep 18
Start indoors: Feb 27 to Mar 6Sow outdoors: Apr 3 to Apr 17
Start indoors: Feb 27 to Mar 6Transplant outside: Apr 10 to Apr 24
Sow outdoors: Mar 6 to Apr 3Plant for fall: Aug 21 to Sep 4
Sow outdoors: Mar 6 to Apr 3Plant for fall: Sep 4 to Sep 18
Sow outdoors: Mar 6 to Mar 27
Sow outdoors: Mar 13 to Apr 10Plant for fall: Sep 4 to Sep 18
Sow outdoors: Mar 13 to Apr 3Plant for fall: Sep 18 to Oct 9
Sow outdoors: Apr 3 to Apr 24Plant for fall: Aug 28 to Sep 11
Sow outdoors: Apr 3 to Apr 17
Transplant outside: Apr 10 to May 1
Plant for fall: Oct 30 to Dec 4
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Annapolis, MD
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 2 – Jan 16 | Feb 27 – Mar 13 | — | — |
| Peppers | Jan 16 – Jan 30 | Apr 10 – Apr 24 | — | — |
| Eggplant | Jan 16 – Jan 30 | Apr 10 – Apr 24 | — | — |
| Tomatoes | Jan 30 – Feb 13 | Apr 3 – Apr 17 | — | — |
| Lettuce | Jan 30 – Feb 13 | Mar 6 – Mar 20 | Feb 27 – Apr 3 | Sep 18 – Oct 16 |
| Kale | Jan 30 – Feb 13 | Feb 27 – Mar 13 | Feb 27 – Mar 13 | Sep 4 – Sep 25 |
| Broccoli | Jan 30 – Feb 13 | Mar 13 – Mar 27 | — | Aug 7 – Aug 28 |
| Cabbage | Jan 30 – Feb 13 | Mar 6 – Mar 20 | — | Aug 7 – Aug 28 |
| Cauliflower | Jan 30 – Feb 13 | Mar 13 – Mar 27 | — | Aug 7 – Aug 28 |
| Okra | Feb 13 – Feb 27 | Apr 17 – May 1 | Apr 17 – May 1 | — |
| Basil | Feb 13 – Feb 27 | Apr 3 – Apr 17 | — | — |
| Peas | — | — | Feb 13 – Mar 6 | Aug 21 – Sep 11 |
| Spinach | — | — | Feb 13 – Mar 6 | Sep 18 – Oct 9 |
| Radishes | — | — | Feb 20 – Apr 3 | Oct 2 – Oct 23 |
| Cucumbers | Feb 27 – Mar 6 | Apr 10 – Apr 17 | Apr 3 – Apr 17 | Aug 28 – Sep 11 |
| Zucchini & Summer Squash | Feb 27 – Mar 6 | — | Apr 3 – Apr 17 | Sep 4 – Sep 18 |
| Winter Squash & Pumpkins | Feb 27 – Mar 6 | — | Apr 3 – Apr 17 | — |
| Melons & Watermelon | Feb 27 – Mar 6 | Apr 10 – Apr 24 | — | — |
| Carrots | — | — | Mar 6 – Apr 3 | Aug 21 – Sep 4 |
| Beets | — | — | Mar 6 – Apr 3 | Sep 4 – Sep 18 |
| Potatoes | — | — | Mar 6 – Mar 27 | — |
| Swiss Chard | — | — | Mar 13 – Apr 10 | Sep 4 – Sep 18 |
| Cilantro | — | — | Mar 13 – Apr 3 | Sep 18 – Oct 9 |
| Green Beans | — | — | Apr 3 – Apr 24 | Aug 28 – Sep 11 |
| Sweet Corn | — | — | Apr 3 – Apr 17 | — |
| Sweet Potatoes | — | Apr 10 – May 1 | — | — |
| Garlic | — | — | — | Oct 30 – Dec 4 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Annapolis Police Brks, MD weather station, 4 km away (elevation 26 ft (8 m)).
ZIP codes in Annapolis: 21401 21402 21403 21404 21405 21409 21411 21412
Frost dates near Annapolis
- Riva Mar 27 · Nov 13
- Pasadena Mar 27 · Nov 13
- Crownsville Mar 27 · Nov 13
- Arnold Mar 27 · Nov 13
- Edgewater Mar 27 · Nov 13
- Davidsonville Mar 27 · Nov 13
- Severna Park Mar 27 · Nov 13
- Crofton Apr 22 · Oct 22
Frequently asked questions
When is the last frost in Annapolis, MD?
The median last spring frost in Annapolis, MD is March 27. There is still about a 10% chance of frost after April 9, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Annapolis, MD?
The median first fall frost is November 13, with about a 10% chance of frost before November 1.
How long is the growing season in Annapolis, MD?
About 231 days between the median last spring frost and first fall frost.
What planting zone is Annapolis, MD?
Annapolis, MD is in USDA hardiness zone 7b.