Onion Seed Information

Onion Seeds

Types of Onion Seeds

  • Short-Day Onions: Thrive in mild winters with short daylight. Example: Texas Early Grano.
  • Intermediate-Day Onions: Require 12–14 hours of daylight. Examples: Candy, Super Star.
  • Long-Day Onions: Need 14–16 hours of daylight. Example: Walla Walla.

Growing Conditions

  • Soil: Well-drained, fertile soil with a pH between 6.0 and 7.0.
  • Temperature: Best germination occurs at 20–25°C (68–77°F).
  • Sunlight: Full sunlight is essential.
  • Watering: Regular watering is important, but avoid waterlogging.

How to Grow Onions

  1. Seed Sowing: Sow seeds 1/4 inch deep in soil or trays indoors 8–10 weeks before transplanting.
  2. Spacing: Maintain 4–6 inches between plants for proper bulb growth.
  3. Harvesting: Onions are ready when the tops fall over and turn brown.