Cabernet Onion Seeds (Organic)

Cabernet Onion is a striking and flavorful variety known for its deep red bulbs and crisp, sweet taste. These medium-sized onions have smooth, papery skin and firm flesh, making them perfect for slicing into salads, layering on sandwiches, or adding a bold touch to roasted dishes. Thriving in full sun and nutrient-rich, well-draining soil, Cabernet Onions mature in about 100-110 days, delivering consistent yields of high-quality bulbs. This variety performs well in traditional garden beds or raised beds and is resistant to common onion diseases, ensuring healthy growth throughout the season.

Variety Details

• Botanical name: Allium cepa
• Plant type: Biennial
• Growth habit: Herbaceous
• Crop category: Onion
• Kitchen profile: Cabernet Onion is a striking and flavorful variety known for its deep red bulbs and crisp, sweet taste.
• Product format: Seed packet with a separately listed bulk option

Sowing & Growing

• Soil Temperature: 50-85°F
• Planting Depth: 1/4-1/2"
• Germination: 3-8 Days
• Height At Maturity: 2-3'
• Days to Maturity: 105 Days
• Sun/Shade: Full Sun
• Spacing After Thinning: 6"

Sow Cabernet Onion according to the local cool-season window and the recorded starting method. Give seedlings strong light when started indoors, then transplant or thin them to the listed spacing. Keep weeds from competing with the narrow foliage and evaluate soil moisture at root depth rather than using a universal schedule. Harvest leaves, stems, or mature bulbs according to the crop type. For storage types, allow curing after the neck and outer layers reach an appropriate stage.

The vibrant red color adds visual appeal to your kitchen creations, while the rich, slightly sweet flavor enhances a wide range of dishes.

Cabernet Onion is also a good keeper, storing well for months in a cool, dry place.

Globe-shaped medium red onion with a nice internal color.

Before sowing Cabernet Onion, review the packet alongside the current product details and note any range in temperature, germination, or maturity. Ranges reflect biological and seasonal variation rather than a fixed promise. Label each planting with its date and location, then compare emergence, growth, and harvest with local weather. This record is useful for succession plantings and for deciding whether the crop fits better into an earlier or later seasonal window.

Explore related options in our Onion Growing Guide.