USDA Hardiness Zone 7b
Frost Dates for 21001 — Aberdeen, Maryland
Averages from Aberdeen Phillips Fld, MD US, the nearest reporting station, 2.6 miles away.
Plant tender crops after April 10, and expect the first autumn freeze around October 30. That leaves about 201 frost-free days.
- Last spring frost
- April 10
- First fall frost
- October 30
- Growing season
- 201 days
- Hardiness zone
- 7b
50% probability
50% probability
frost-free
5 to 10°F annual low
- First snow
- December 27
- Last snow
- February 26
- Winters with snow
- 93%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
28 of 30 observed
NOAA normal
When it snows in Aberdeen, Maryland
The first measurable snow (0.1 inch or more) in Aberdeen, Maryland usually arrives around December 27, and the last of the season around February 26. Those are the middle dates across the winters of 1991–2020 at Aberdeen Phillips Fld, MD US: half of years saw snow earlier, half later. Snow fell in 93% of those winters.
For a gardener, snow matters less than frost: a light snow on frozen ground changes nothing, while a hard frost on an unprotected bed ends the season. Use the frost dates above for planting and the snow dates for getting hoses drained, mulch down and tender pots indoors.
Planting calendar for 21001
| When | What to do |
|---|---|
| January 30 – February 13 | Start peppers and aubergines indoors They need eight to ten weeks under lights before they can go out. |
| February 13 – February 27 | Start tomatoes indoors Six to eight weeks gives a transplant big enough to set fruit early. |
| March 13 – March 27 | Sow peas, spinach, lettuce, radish outdoors These tolerate light frost and prefer to germinate in cool soil. |
| April 10 onward | Transplant tomatoes, peppers, basil, squash, cucumbers The average last freeze has passed — still watch the actual forecast. |
| by August 7 | Sow the autumn crop of carrots, beets and brassicas They need about twelve weeks to size up before growth stops. |
| by October 16 | Harvest tender crops, or be ready to cover them A first freeze two weeks early is well within normal variation. |
| October 30 onward | Plant garlic, mulch beds, lift tender bulbs Garlic wants a cold spell; bare soil loses structure over winter. |
What these dates mean
Wait until after April 10 to put tender plants — tomatoes, peppers, basil, squash — in the ground. That is the date by which half of years in Aberdeen, Maryland are past their last freeze. Harvest before October 30, which leaves roughly 201 frost-free days.
ZIP 21001 sits in USDA hardiness zone 7b, meaning the average coldest night of the year falls between 5 to 10°F. Zone decides what survives the winter; frost dates decide when to plant each spring. They are different questions, and a plant can pass one and fail the other.
These are thirty-year NOAA averages for 1991–2020, not a forecast. Any individual year can frost two to three weeks either side of these dates, so check the actual forecast before planting out.