Forest Heights, MD 22320 Frost Dates
When can you plant in Forest Heights, MD?
Typically, the last spring freeze lands around 04/03, roughly 218 days out. The first fall frost typically arrives around 11/08, about 217 frost-free days later.
The USDA Plant Hardiness Zone Map puts Forest Heights in Zone 8a (10 to 15°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
About 10 weeks of growing season left in Forest Heights before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Forest Heights's last frost
04/03 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 Forest Heights compares
About 217 days separate Forest Heights's last and first frost, putting it 13,507 of 40,283 ZIP codes nationally. Within MD, it ranks 306 of 583.
Learn more
the frost range covers how to read the range around Forest Heights's dates instead of trusting one. local microclimates covers what one yard in Forest Heights can differ from the 22320 normal.