Great interactive plant maps by the USDA showing heat/hardiness zones, first/last frost dates, drought index, high/low temps. Be sure to look at the difference between the 1990 map and the updated 2012 map. Link is below.
The Carthage area is in hardiness zone 8b, last frost is April 1 – April 10.
All of this info is needed to know which plants will grow well in our gardens. Yes, we need this info even when growing native plants.
Happy digging in the dirt!