Botanical Name: Brassica oleracea var. botrytis
Days to Maturity: 95–100 days
Hardiness: Frost-tolerant biennial grown as an annual
Plant Dimensions: Compact plants, 12"–24" tall and wide
Variety Information: Dense, white, 6"–7" diameter heads, weighing 2–3 pounds each, are composed of undeveloped flower buds commonly called curds that are attached to a central stalk. 'Early Snowball', also called 'Henderson's Early Snowball', is a compact plant with white heads introduced in 1888. It was selected from the German variety, 'Dwarf Erfurt'.
Attributes: Good for Containers
When to Sow Outside: Not recommended. 1 to 2 weeks before your average last frost date, or 10 to 12 weeks before your average first fall frost date. In Mild Climates, sow in early fall for winter harvest.
When to Start Inside: RECOMMENDED. 4 to 6 weeks before transplanting outside after your average last frost date, or 12 weeks before your average first fall frost date. In mild climates, sow in fall for harvest in late winter and early spring. Ideal soil temperature for germination is 70°–85°F, with cooler (60°F) growing temperatures thereafter.
Days to Emerge: 8–10 days
Seed Depth: ¼"
Seed Spacing: A group of 3 seeds every 24"
Row Spacing: 24"–36"
Thinning: When 2" tall, thin to 1 every 24"
Harvesting: Harvest heads in the morning, if possible, and when buds are tight. Cut stalk below the head. Dunk heads in ice water to reduce any "field heat" and increase storage time. Allow to drain before storing.