Lutherville-Timonium, MD planting zone & frost dates
Lutherville-Timonium is in USDA hardiness zone 7b. The last spring frost usually comes around April 2 and the first fall frost around November 7, for a growing season of about 220 days.
Planting calendar for Lutherville-Timonium
Dates are counted from the average last spring frost (April 2) 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 5 – Feb 19 Transplant outdoors: Apr 9 – Apr 16 |
| Peppers | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Apr 16 – Apr 23 |
| Eggplant | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Apr 16 – Apr 23 |
| Broccoli | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Mar 5 – Mar 19 |
| Cabbage | Start seeds indoors: Jan 22 – Feb 5 Transplant outdoors: Mar 5 – Mar 19 |
| Onions (sets) | Plant outdoors: Mar 5 – Mar 19 |
| Peas | Sow outdoors: Feb 19 – Mar 5 |
| Spinach | Sow outdoors: Feb 19 – Mar 5 |
| Lettuce | Sow outdoors: Mar 5 – Mar 19 |
| Carrots | Sow outdoors: Mar 5 – Mar 19 |
| Potatoes | Plant outdoors: Mar 5 – Mar 19 |
| Beans | Sow outdoors: Apr 9 – Apr 16 |
| Sweet corn | Sow outdoors: Apr 9 – Apr 16 |
| Cucumbers | Sow outdoors: Apr 9 – Apr 16 |
| Squash & zucchini | Sow outdoors: Apr 9 – Apr 16 |
| Basil | Start seeds indoors: Feb 19 – Mar 5 Transplant outdoors: Apr 9 – Apr 16 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 12 (8 weeks before the average first fall frost on Nov 7).
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 20 | Apr 2 | Apr 13 |
| First 32°F frost in fall is before | Nov 21 | Nov 7 | Oct 27 |
How to read it: in spring there is a 10% chance of a frost after April 13, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 27. A hard freeze (28°F) usually ends around March 22.
Nearby cities
- Mays Chapel zone 7b, last frost Apr 2
- Towson zone 7b, last frost Apr 2
- Cockeysville zone 7b, last frost Apr 2
- Hunt Valley zone 7b, last frost Apr 2
- Parkville zone 7b, last frost Apr 2
- Carney zone 7b, last frost Apr 2
- Overlea zone 7b, last frost Apr 2
- Pikesville zone 7b, last frost Apr 2
Questions
What growing zone is Lutherville-Timonium, MD?
Lutherville-Timonium 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 Lutherville-Timonium?
The average last spring frost (32°F) in Lutherville-Timonium is April 2. There is still a 10% chance of frost until April 13.
When can I plant tomatoes in Lutherville-Timonium?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Apr 9 – Apr 16. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Cylburn, MD (USC00182308), 10.3 km (6.4 mi) from the city center, elevation 72 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.