Cabernet Onion Plants (Intermediate/Long Day)

Cabernet is a premium intermediate-day red onion developed by Seminis (Bayer) for outstanding color retention, uniform globe shape, and superior storage among red onions. This variety delivers 3–4" deep-crimson bulbs with tight, glossy wrappers and vibrant purple-red rings that resist fading during cooking or pickling. Its sweet-with-a-kick flavor bridges mild sweets and pungent storage reds—ideal for fresh eating, grilling, salsas, or long-keeping.

Each bundle contains approximately 75 healthy, premium, non-GMO plants grown with natural and regenerative practices.

Key Details at a Glance

• Day length: Intermediate-Day (best in zones 5–8)
• Days to maturity: 100–110 from transplant
• Mature bulb size: 3–4 inches
• Storage life: 5–7 months when cured
• Bundle size: Approximately 75 bare-root plants

Why Grow Cabernet?

• Wine-red color – Deep, glossy skin and vivid rings that hold up in heat.
• Sweet-spicy balance – More flavor than mild reds, less bite than storage types.
• Solid keeper – Outlasts most red onions; stores well into winter.
• High visual appeal – Stands out at markets and on plates.

Growing Tips Direct-transplant as soon as soil can be worked in early spring (soil ≥40°F). Space 4–6″ apart in rows 12–18″ apart. Provide full sun, consistent moisture (1″ weekly), and occasional nitrogen boosts. Mulch to retain moisture and suppress weeds. Harvest when 50–70% of tops yellow and fall over; cure in a dry, airy spot for 2–3 weeks.

Standard Information

• Plant type: Bulbing onion (Allium cepa)
• Sun: Full sun (6–8+ hours)
• Soil: Well-drained, fertile loam; pH 6.0–7.0
• Water: Consistent, especially during bulb formation
• Hardiness zones: 3–9 (bulbs form best in intermediate-day regions)

Origin & Quality All plants are grown and shipped as bare-root, dormant starts in biodegradable wrap from Sunbelt Transplants, a trusted leader in premium onion transplants based in the heart of U.S. onion country.

Disclaimer Although these onions are grown by farms that are certified organic, we are not allowed to say it is Certified due to the rule 7 CFR § 205.2. The Farm On Central is in the process of becoming a Certified Handler for the 2026 season. All product provided for the 2026 season will be certified.