Oxon Hill-Glassmanor, MD planting zone & frost dates
Oxon Hill-Glassmanor is in USDA hardiness zone 7b. The last spring frost usually comes around April 3 and the first fall frost around November 8, for a growing season of about 217 days.
Planting calendar for Oxon Hill-Glassmanor
Dates are counted from the average last spring frost (April 3) 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: Feb 6 – Feb 20 Transplant outdoors: Apr 10 – Apr 17 |
| Peppers | Start seeds indoors: Jan 23 – Feb 6 Transplant outdoors: Apr 17 – Apr 24 |
| Eggplant | Start seeds indoors: Jan 23 – Feb 6 Transplant outdoors: Apr 17 – Apr 24 |
| Broccoli | Start seeds indoors: Jan 23 – Feb 6 Transplant outdoors: Mar 6 – Mar 20 |
| Cabbage | Start seeds indoors: Jan 23 – Feb 6 Transplant outdoors: Mar 6 – Mar 20 |
| Onions (sets) | Plant outdoors: Mar 6 – Mar 20 |
| Peas | Sow outdoors: Feb 20 – Mar 6 |
| Spinach | Sow outdoors: Feb 20 – Mar 6 |
| Lettuce | Sow outdoors: Mar 6 – Mar 20 |
| Carrots | Sow outdoors: Mar 6 – Mar 20 |
| Potatoes | Plant outdoors: Mar 6 – Mar 20 |
| Beans | Sow outdoors: Apr 10 – Apr 17 |
| Sweet corn | Sow outdoors: Apr 10 – Apr 17 |
| Cucumbers | Sow outdoors: Apr 10 – Apr 17 |
| Squash & zucchini | Sow outdoors: Apr 10 – Apr 17 |
| Basil | Start seeds indoors: Feb 20 – Mar 6 Transplant outdoors: Apr 10 – Apr 17 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 13 (8 weeks before the average first fall frost on Nov 8).
Useful for zone 7b gardens
- Seed starting kit with dome — to start seeds indoors before the last frost
- LED grow light for seedlings — stops leggy seedlings
- Frost cloth / plant covers — for late spring and early fall frosts
- Soil thermometer — warm-season crops need soil above 60°F
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Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Mar 19 | Apr 3 | Apr 15 |
| First 32°F frost in fall is before | Nov 23 | Nov 8 | Oct 24 |
How to read it: in spring there is a 10% chance of a frost after April 15, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 24. A hard freeze (28°F) usually ends around March 21.
Nearby cities
- Oxon Hill zone 7b, last frost Apr 3
- Glassmanor zone 8a, last frost Apr 3
- Hillcrest Heights zone 7b, last frost Apr 3
- Camp Springs zone 7b, last frost Apr 3
- Suitland-Silver Hill zone 7b, last frost Apr 3
- Suitland zone 7b, last frost Mar 29
- Clinton zone 7b, last frost Apr 3
- Fort Washington zone 7b, last frost Apr 3
Questions
What growing zone is Oxon Hill-Glassmanor, MD?
Oxon Hill-Glassmanor is in USDA Plant Hardiness Zone 7b (average extreme winter low 5°F to 10°F), according to the USDA 2023 map.
When is the last frost in Oxon Hill-Glassmanor?
The average last spring frost (32°F) in Oxon Hill-Glassmanor is April 3. There is still a 10% chance of frost until April 15.
When can I plant tomatoes in Oxon Hill-Glassmanor?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 10 – Apr 17. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Oxon Hill, MD (USC00186800), 1.7 km (1.1 mi) from the city center, elevation 58 m, based on 16 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.