Frost Dates for Baltimore, MD 21214
Baltimore has 25 ZIP codes. The Baltimore, MD frost page lists all of them with their dates.
Last spring frost April 11 · First fall frost October 29 · 201 frost-free days · USDA Zone 7b
Frost probability for 21214
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 22 | April 11 | March 31 |
| Fall (first frost) | October 13 | October 29 | November 11 |
Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (22.4 km away); the 50% date is the median year.
Month by month in Baltimore
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start peppers and eggplant indoors 8–10 weeks before your last frost (around April 11). Start tomatoes about two weeks later, 6–8 weeks before last frost. |
| March | Start herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable. |
| April | Last frost around April 11. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings. |
| May | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| June | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| July | Harvest regularly to encourage production. Monitor for pests and disease. |
| August | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| September | First fall frost approaching (around October 29). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| October | First frost around October 29. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season. |
| November | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
What grows in a 201-day season
Frequently Asked Questions
What is the last frost date for Baltimore, MD (ZIP 21214)?
The median last spring frost date for Baltimore, MD (ZIP code 21214) is around April 11. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.
What is the first fall frost date in Baltimore, MD?
The median first fall frost date for Baltimore, MD is around October 29. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.
How long is the growing season in Baltimore, MD?
The frost-free growing season in Baltimore is about 201 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.
What USDA hardiness zone is Baltimore, MD?
Based on frost date patterns, Baltimore falls approximately in 7b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.
When should I start tomatoes indoors in Baltimore, MD?
Start tomato seeds indoors 6–8 weeks before your last frost date (around April 11). For Baltimore, that's roughly February 15 to February 29. Transplant outdoors 1–2 weeks after your last frost.
Nearby and related
- Frost dates for Baltimore, MD 21206 (1.7 mi)
- Frost dates for Parkville, MD 21234 (3.4 mi)
- Frost dates for Rosedale, MD 21237 (3.8 mi)
- Frost dates for Towson, MD 21286 (4.3 mi)
- Frost dates for Nottingham, MD 21236 (4.9 mi)
- When to plant in Baltimore, MD: month-by-month guide
- When to plant in MD
- When to plant Peppers in MD
- When to plant Cucumbers in MD
- When to plant Zucchini in MD
- When to plant Butternut Squash in MD
- When to plant Basil in MD
- When to plant Sweet Corn in MD
- Look up another ZIP