Maryland frost dates
Typical and safer frost dates for 1 cities in Maryland, each from its nearest NOAA station. Elevation matters here as much as latitude, so check the city closest to you.
| City | Last frost · typical | Last frost · safer | First frost · typical | Frost-free days |
|---|---|---|---|---|
| Baltimore | Mar 24 | Apr 4 | Nov 21 | 244 |
Planting calendar for Baltimore
The largest city we cover in Maryland. Other cities: see their own page.
Frost dates
Mar 24
Last spring frost, typical
In half of the years that freeze, the last frost comes later.
Safer date: Apr 4. Only 1 freeze year in 10 has a frost after this.
Nov 21
First fall frost, typical
In half of the years that freeze, it comes earlier.
Early date: Nov 7. Only 1 freeze year in 10 freezes before this.
244
Days, typical frost-free season
From NOAA’s 1991–2020 climate normals for this station.
What to plant right now
As of Nov 9, 2026
Typical frost-free season: 244 days. Station: Md Sci Ctr Baltimore, MD, 2 km away. Source: NOAA NCEI U.S. Climate Normals 1991–2020 (32°F threshold).
February
The next window opens in February.
Tomatotender
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Transplant outdoors
- Apr 4 – Apr 18
Eggplanttender
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Transplant outdoors
- Apr 4 – Apr 18
Broccolihardy
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Transplant outdoors
- Mar 7 – Apr 4
- Sow outdoors
- Mar 7 – Mar 21
- Sow for fall
- Aug 15 – Aug 29
Cabbagehardy
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Transplant outdoors
- Mar 7 – Apr 4
- Sow outdoors
- Mar 7 – Mar 21
- Sow for fall
- Aug 15 – Aug 29
Cauliflowerhalf hardy
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Transplant outdoors
- Mar 21 – Apr 4
- Sow outdoors
- Mar 14 – Apr 4
- Sow for fall
- Aug 15 – Aug 29
Brussels sproutshardy
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Sow outdoors
- Mar 14 – Mar 14
- Sow for fall
- Aug 15 – Aug 29
Marigoldtender
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 7
- Transplant outdoors
- Apr 4 – Apr 4
Calendulahalf hardy
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Sow outdoors
- Mar 28 – Apr 4
Mexican sunflowertender
Next: start indoors from Feb 7
- Start indoors
- Feb 7 – Feb 21
- Sow outdoors
- Apr 4 – Apr 4
Leaf lettucehardy
Next: sow outdoors from Feb 21
- Transplant outdoors
- Mar 7 – Mar 21
- Sow outdoors
- Feb 21 – Mar 21
Head lettucehardy
Next: sow outdoors from Feb 21
- Transplant outdoors
- Mar 7 – Mar 21
- Sow outdoors
- Feb 21 – Mar 21
Zinniatender
Next: start indoors from Feb 21
- Start indoors
- Feb 21 – Mar 7
- Sow outdoors
- Apr 4 – Apr 4
Nasturtiumtender
Next: start indoors from Feb 21
- Start indoors
- Feb 21 – Mar 7
- Sow outdoors
- Apr 4 – Apr 4
Sunflowertender
Next: start indoors from Feb 21
- Start indoors
- Feb 21 – Mar 7
March
The next window opens in March.
Cucumbertender
Next: start indoors from Mar 7
- Start indoors
- Mar 7 – Mar 21
- Sow outdoors
- Apr 4 – Apr 11
Summer squashtender
Next: start indoors from Mar 7
- Start indoors
- Mar 7 – Mar 21
- Sow outdoors
- Apr 4 – Apr 11
Winter squashtender
Next: start indoors from Mar 7
- Start indoors
- Mar 7 – Mar 21
- Sow outdoors
- Apr 11 – Apr 18
Watermelontender
Next: start indoors from Mar 7
- Start indoors
- Mar 7 – Mar 21
- Transplant outdoors
- Apr 11 – Apr 18
- Sow outdoors
- Apr 11 – Apr 18
Cantaloupetender
Next: start indoors from Mar 7
- Start indoors
- Mar 7 – Mar 14
- Sow outdoors
- Apr 11 – Apr 18
Peahardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Mar 21
Spinachhardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Mar 21
Kohlrabihardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Mar 21
- Sow for fall
- Aug 15 – Aug 29
Radishhardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Mar 21
Beethalf hardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Apr 4
Turniphardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Mar 21
Bulb onionhardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Mar 21
Green onionhardy
Next: sow outdoors from Mar 7
- Sow outdoors
- Mar 7 – Mar 21
Kalehardy
Next: sow outdoors from Mar 14
- Sow outdoors
- Mar 14 – Mar 14
- Sow for fall
- Aug 15 – Aug 29
Collardshardy
Next: sow outdoors from Mar 14
- Sow outdoors
- Mar 14 – Mar 14
- Sow for fall
- Aug 15 – Aug 29
Swiss chardhalf hardy
Next: sow outdoors from Mar 21
- Sow outdoors
- Mar 21 – Apr 4
Carrothalf hardy
Next: sow outdoors from Mar 21
- Sow outdoors
- Mar 21 – Apr 4
Potatohalf hardy
Next: sow outdoors from Mar 21
- Sow outdoors
- Mar 21 – Apr 4
Parsniphalf hardy
Next: sow outdoors from Mar 21
- Sow outdoors
- Mar 21 – Apr 4
Dillhalf hardy
Next: sow outdoors from Mar 21
- Sow outdoors
- Mar 21 – Mar 28
April
The next window opens in April.
Bush beantender
Next: sow outdoors from Apr 4
- Sow outdoors
- Apr 4 – Apr 4
Pole beantender
Next: sow outdoors from Apr 4
- Sow outdoors
- Apr 4 – Apr 4
Sweet corntender
Next: sow outdoors from Apr 4
- Sow outdoors
- Apr 4 – Apr 4
Basiltender
Next: sow outdoors from Apr 4
- Sow outdoors
- Apr 4 – Apr 4
Marjoramtender
Next: transplant outdoors from Apr 4
- Transplant outdoors
- Apr 4 – Apr 4
Pumpkintender
Next: sow outdoors from Apr 11
- Sow outdoors
- Apr 11 – Apr 18
Lima beantender
Next: sow outdoors from Apr 18
- Sow outdoors
- Apr 18 – Apr 18
September
The next window opens in September.
Sweet alyssumhardy
Next: sow for fall from Sep 26
- Sow for fall
- Sep 26 – Sep 26
No window listed
No frost-based window for these crops.
Mustard greenshalf hardy
No frost-based window listed.
No frost-based sowing window is listed for mustard greens.