Frost dates for Cylburn, MD
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
April 2
typical year
Safe to plant
April 13
frost is over in 9 of 10 years
First fall frost
November 7
typical year
Growing season
220 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Mar 5 – 19 | – |
| Spinach | – | Feb 19 – Mar 12 | Sep 12 – 26 |
| Lettuce | – | Mar 5 – 26 | Sep 12 – 26 |
| Radishes | – | Mar 5 – Apr 16 | Sep 26 – Oct 10 |
| Onions | – | Mar 5 – 19 | – |
| Potatoes | – | Mar 12 – 26 | – |
| Carrots | – | Mar 12 – Apr 2 | Aug 15 – 29 |
| Beets | – | Mar 5 – 19 | Aug 29 – Sep 12 |
| Kale | Jan 22 – Feb 5 | Mar 5 – 19 | Aug 29 – Sep 12 |
| Broccoli | Jan 22 – Feb 5 | Mar 19 – Apr 2 | Aug 29 – Sep 12 |
| Cabbage | Jan 8 – 22 | Mar 5 – 19 | Aug 29 – Sep 12 |
| Garlic | – | – | Sep 26 – Oct 17 |
| Warm-season crops | |||
| Tomatoes | Feb 16 – Mar 2 | Apr 13 – 27 | – |
| Peppers | Feb 9 – 23 | Apr 20 – May 4 | – |
| Cucumbers | – | Apr 13 – May 4 | – |
| Zucchini | – | Apr 13 – May 11 | – |
| Pumpkins | – | Apr 13 – May 4 | – |
| Green beans | – | Apr 13 – Aug 29 | – |
| Sweet corn | – | Apr 13 – May 11 | – |
| Basil | Mar 9 – 23 | Apr 20 – 27 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | April 13 | April 2 | March 20 |
| Fall frost before | October 27 | November 7 | November 21 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around March 22 (April 3 in a late year), and the first one in fall around November 20.
Where these dates come from
NOAA weather station CYLBURN, MD US (USC00182308), 1991–2020 climate normals. It's the nearest station for 36 zip codes, all within 14 miles:
21013, 21023, 21030, 21031, 21051, 21057, 21071, 21082, 21093, 21104, 21117, 21128, 21131, 21133, 21136, 21153, 21163, 21204, 21207, 21208, 21209, 21210, 21211, 21212, 21214, 21215, 21216, 21218, 21234, 21236, 21239, 21244, 21251, 21252, 21285, 21286
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.