Contact

Questions, corrections, or feedback about FrostCal's frost dates and planting calendars? Get in touch.

Especially useful to hear about:

Data issues — a city whose frost dates look wrong for the area (include the city and what you'd expect; note that dates come from the nearest NOAA station, which can differ from a specific microclimate).
Missing cities — a US city you'd like added.
Corrections — planting-window guidance that conflicts with your local extension office's advice.

FrostCal is an independent reference site and is not affiliated with NOAA or the USDA. See the methodology page for how the numbers are produced.