Garrett Park, MD 20906 Frost Dates
Frost dates for Garrett Park, MD, ZIP 20906
The last spring frost here typically falls around 04/01, about 216 days from today. The first fall frost typically arrives around 11/06, about 219 frost-free days later.
The USDA Plant Hardiness Zone Map puts Garrett Park in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7b around Garrett Park has about 10 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/01 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Garrett Park compares
About 219 days separate Garrett Park's last and first frost, putting it 13,072 of 40,283 ZIP codes nationally. Within MD, it ranks 232 of 583.
Learn more
zone vs. frost date explains why Zone 7b and Garrett Park's frost date answer different questions, and the frost range explains how to read the range around Garrett Park's dates instead of trusting one.