Frost Map for Planting Dates

The Old Farmer's Almanac uses a formula that takes into account both climatological normals and historical weather data to make its predictions. They also consider solar activity when making long-range forecasts. Keep in mind that these are just estimates, and local microclimates can vary. It's always a good idea to monitor your local weather conditions. For example, the average last frost date for Austin, Texas is February 14, but the range of possible dates stretches from January 20 to March 29. Atlanta, Georgia's average last frost date is March 21, but could be as early as February 1 or as late as April 11. Knowing your area's frost dates can help you avoid the disappointment of losing young plants to a late cold snap. Timing is everything for a successful garden.