Leonardtown, MD 20659 Frost Dates
When can you plant in Leonardtown, MD?
The last spring frost here typically falls around 04/17, about 232 days from today. The first fall frost typically arrives around 10/27, about 195 frost-free days later.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Leonardtown, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Leonardtown before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leonardtown compares
Leonardtown's growing season runs about 195 days, ranking 19,255 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 512 of 583.
Learn more
the frost range covers how to read the range around Leonardtown's dates instead of trusting one. local microclimates covers what one yard in Leonardtown can differ from the 20659 normal.