Botanical Name: Brassica oleracea var. viridis
Days to Maturity: 50–80 days
Hardiness: Frost-tolerant biennial, grown as annual. Can tolerate freezes (down to 20?F) and summer heat better than other greens.
Plant Dimensions: 24"–36" tall, 18" wide
Variety Information: Large, cabbage-like, blue-green, slightly crumpled leaves. Collards are a non-head-forming cabbage. 'Georgia Southern' is also known as 'True Southern', 'Southern', 'True Georgia', 'Creole', and 'Georgia Green'.
Attributes: Good for Containers, Heat Tolerant
When to Sow Outside: 2 to 4 weeks before your average last frost date, when soil temperature is at least 55°F, ideally 75°–85°F, or 14 to 16 weeks before your average first fall frost date. Late summer sowings produce the best collard flavor, which occurs after light fall frosts. In Mild Climates, sow in fall for cool–season harvest.
When to Start Inside: 4 to 6 weeks before your average last frost date.
Days to Emerge: 10 – 15 days
Seed Depth: ½"
Seed Spacing: A group of 3 seeds every 18" – 24"
Row Spacing: 24"
Thinning: When 3" tall, thin to 1 every 18" – 24"
Harvesting: Lower, outer leaves can be harvested as needed, and new leaves will continue to grow. The entire plant can be harvested when young, at 6"–8", or when mature, at 24"–36" by cutting at ground level, although, it will not regrow.