Red Onion Seeds - All In One For Home Gardens

Red onion seeds produce cool-season bulb-forming plants commonly grown for their layered underground bulbs and upright green foliage. These plants are adaptable to a range of climates and can be cultivated in garden beds, raised beds, or containers with sufficient depth. Onions develop best in loose, well-drained soil and require consistent moisture during early growth and bulb formation. They are suitable for seasonal planting and can be grown in both short and long growing cycles depending on regional conditions.

Features

• Bulb-forming plant with upright leafy growth

• Suitable for garden beds, raised beds, and deep containers

• Adaptable to different climates with seasonal planting

• Requires loose soil for proper bulb development

• Supports structured row planting and spacing

Specifications

• Scientific Name: Allium cepa

• Common Name (US): Onion

• Seed Type / Variety: Red onion variety

• Growth Habit: Bulb vegetable (biennial grown as annual)

• USDA Zones: 3–9

• Planting Season: Early spring or fall (mild climates)

• Growing Season: Spring to summer

• Sowing Season:

  • January–March (indoor or early sowing)

  • September–October (fall sowing in mild regions)

• Germination Time and Conditions: 7–14 days at 15–25°C with consistent moisture

• Sunlight Requirements: Full sun

• Soil Requirements: Loose, well-drained soil with moderate fertility

• Watering Needs: Moderate; maintain even moisture during bulb formation

• Mature Plant Size: 12–18 inches height

• Plant Spacing: 3–6 inches between plants