In the Southeast, planting a variety with too few chill hours is just as dangerous as planting one with too many. Cross-reference your microclimate against variety requirements below.
Chill hour estimates for Upstate SC are derived from NOAA historical data averaged over 1991–2020. Microclimatic variation — cold air drainage, elevation, aspect — can shift your site ±100–150 hours from the regional average. Monitor your own site over multiple seasons before finalising variety selection.
Chill hour data is based on regional averages for the Upstate SC Piedmont and Foothills zones. Individual site conditions, cold air drainage, and year-to-year climate variability can shift actual accumulation significantly. Use this tool for planning guidance only. Verify with your local extension service before committing to a planting plan.