Botanical Name: Allium cepa (hybrid)
Days to Maturity: 160 days
Native: Exists only in cultivation
Hardiness: Biennial grown as an annual
Variety Information: Jumbo 3"–4½" bulbs have vigorous tops. Light brown skin surrounds these yellow onions. 'Gabriella' is a storage onion with a short storage period of 2 to 3 months.
Type: Short-day onion (Learn more)
When to Sow Outside: Mild Climates only: Late summer or early fall. Mid-October is the recommended, traditional sowing period.
When to Start Inside: Mild Climates only: 10 to12 weeks before your average first fall frost date. Transplant outside no later than 6 weeks before your average first fall frost date. Ideal soil temperature is 60°-85°F.
Days to Emerge: 7–15 days
Seed Depth: ¼"
Seed Spacing: A group of 2 seeds every 5"
Row Spacing: 12"–16"
Thinning: When 2" tall, thin to 1 every 5"
Harvesting: When onion tops have fallen over and turned yellow or brown, they are ready for harvest. Harvest in the morning, lifting onions with a garden fork. Dry them in the garden in the sun for 2 to 3 days, lightly covering the bulbs with straw, or the tops of other onions to prevent sunscald. Cure onions for 3 to 7 days in a dry area with good air circulation. Once dry, cut the roots to ¼", and the greens to 1" to create a seal, preventing decay.