Planting dates shown on this site are estimated based on information provided on seed packets - number of weeks before/after the approximate first frost date in a region (currently Zone 7, Raleigh area North Carolina, which is around April 15). Where a range of weeks is provided, one was chosen to coincide with other seeds to be planted around the same time.
These dates are provided as guidelines. Take note of local weather conditions to determine if planting is advisable.