Annapolis, MD planting zone & frost dates
Annapolis is in USDA hardiness zone 8a. The last spring frost usually comes around March 27 and the first fall frost around November 13, for a growing season of about 234 days.
Planting calendar for Annapolis
Dates are counted from the average last spring frost (March 27) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Jan 30 – Feb 13 Transplant outdoors: Apr 3 – Apr 10 |
| Peppers | Start seeds indoors: Jan 16 – Jan 30 Transplant outdoors: Apr 10 – Apr 17 |
| Eggplant | Start seeds indoors: Jan 16 – Jan 30 Transplant outdoors: Apr 10 – Apr 17 |
| Broccoli | Start seeds indoors: Jan 16 – Jan 30 Transplant outdoors: Feb 27 – Mar 13 |
| Cabbage | Start seeds indoors: Jan 16 – Jan 30 Transplant outdoors: Feb 27 – Mar 13 |
| Onions (sets) | Plant outdoors: Feb 27 – Mar 13 |
| Peas | Sow outdoors: Feb 13 – Feb 27 |
| Spinach | Sow outdoors: Feb 13 – Feb 27 |
| Lettuce | Sow outdoors: Feb 27 – Mar 13 |
| Carrots | Sow outdoors: Feb 27 – Mar 13 |
| Potatoes | Plant outdoors: Feb 27 – Mar 13 |
| Beans | Sow outdoors: Apr 3 – Apr 10 |
| Sweet corn | Sow outdoors: Apr 3 – Apr 10 |
| Cucumbers | Sow outdoors: Apr 3 – Apr 10 |
| Squash & zucchini | Sow outdoors: Apr 3 – Apr 10 |
| Basil | Start seeds indoors: Feb 13 – Feb 27 Transplant outdoors: Apr 3 – Apr 10 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 18 (8 weeks before the average first fall frost on Nov 13).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Mar 9 | Mar 27 | Apr 9 |
| First 32°F frost in fall is before | Dec 1 | Nov 13 | Nov 1 |
How to read it: in spring there is a 10% chance of a frost after April 9, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 1. A hard freeze (28°F) usually ends around March 14.
Hardiness zone by ZIP code in Annapolis
- 21401 zone 7b
- 21402 zone 8a
- 21403 zone 8a
- 21404 zone 8a
- 21405 zone 8a
- 21409 zone 8a
- 21411 zone 8a
- 21412 zone 8a
Nearby cities
- Parole zone 7b, last frost Mar 27
- Arnold zone 8a, last frost Mar 27
- Severna Park zone 8a, last frost Mar 27
- Lake Shore zone 8a, last frost Mar 27
- Pasadena zone 8a, last frost Apr 10
- Green Haven zone 8a, last frost Apr 10
- Riviera Beach zone 8a, last frost Apr 10
- Crofton zone 7b, last frost Apr 22
Questions
What growing zone is Annapolis, MD?
Annapolis is in USDA Plant Hardiness Zone 8a (average extreme winter low 10°F to 15°F), according to the USDA 2023 map. Some ZIP codes of the city fall in zone 7b.
When is the last frost in Annapolis?
The average last spring frost (32°F) in Annapolis is March 27. There is still a 10% chance of frost until April 9.
When can I plant tomatoes in Annapolis?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 3 – Apr 10. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Annapolis Police Brks, MD (USC00180193), 2.1 km (1.3 mi) from the city center, elevation 8 m, based on 13 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.