Last spring frost: March 28 (50% probability)
First fall frost: November 11 (50% probability)
Frost-free growing season: 228 days
Approximate USDA zone: 8a
The median last spring frost date for Norcross, GA (ZIP code 30093) is around March 28. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.
The median first fall frost date for Norcross, GA is around November 11. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.
The frost-free growing season in Norcross is about 228 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.
Based on frost date patterns, Norcross falls approximately in 8a. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.
Start tomato seeds indoors 6–8 weeks before your last frost date (around March 28). That means starting in late June 28 or early July 28 for Norcross. Transplant outdoors 1–2 weeks after your last frost.